The Flesh Pit/The Lab

In Mortal Kombat 2011 this arena is where Mileena was created. It should also be noted that Meat was also created here. 

The Flame of Olympus

The Flame of Olympus is Kratos Arena in Mortal Kombat 2011 

UN Space Station

UN Space Station is a arena in Mortal Kombat vs. DC Universe. It takes place at the DC side at space.

Throne Room

The Throne Room is also known as Shang Tsung's Throne Room located at his old island fortress within the Lost Sea in Earthrealm and first appeared inMortal Kombat 1.

Themyscira

Themyscira is home of the Amazons and their princess and champion,Wonder Woman. It's a fighting arena in Mortal Kombat vs. DC Universe.

This Island stage is halfway merged between Wonder Woman's homeland of Themyscira and Shang Tsung's palace in Outworld. There are no stage transitions but it features nice effects.

Special Forces Base

The Special Forces Base is an arena in Mortal Kombat vs. DC Universe. It began to have rumors when a new poster of Sonya standing on a platform (the background seems like if she were on The Moon).

The Special Forces Base is divided in two:

The upper half of the Special Forces stronghold has a few looming plane like vehicles and computer bays in the background. Players can be Free Fall Kombat'd to the helipads below.

the lower half of the Special Forces stronghold is just a few helipads near the water. Players wind up here when knocked from above.

Raiden's Temple

Raiden's Temple or the Temple of Raiden is an arena and an another temple built for the worship of the thunder god Raiden, as well as it was built as his another place of meditaition. The temple first appeared in Mortal Kombat VS. DC Universe. It is similiar to the Sky Temple in Mortal Kombat: Deception.

Metropolis

Metropolis is the city Superman lives. The city is nearly destroyed by Darkseid.

Upon inspection, most areas here are shown in DC comics or movies.

This arena makes its appearance in Mortal Kombat vs. DC Universe.

Oan Senate

Oan Senate is an arena from Mortal Kombat vs. DC Universe. The arena is decorated with objects remiding the Green Lantern, which is explained by the fact that the arena resides in Planet Oa, the planet where the Green Lantern Troop headquartes is located. This is where the fight between Joker,Sonya,Deathstroke, and Kano take place. Also where Joker gets his Rage powers.

Gotham City

Gotham City is an arena in Mortal Kombat vs. DC Universe. This arena is on the DC side and Batman's home city. The battle begins on a rooftop of a building from where you can throw your opponent to the streets down below.The places featured are other buildings, and the back alleys of Gotham. In the alleys you can see quotes of the Joker from the game. This is also the area in main menu.

Fortress of Solitude

The Fortress of Solitude is the occasional headquarters of DC superhero Superman, and is an arena featured in Mortal Kombat vs. DC Universe. It is made of numerous crystal formations that resemble ice. You can kick a opponent though one of the formations to enter freefall kombat before landing on the second floor of the arena.

Bat Cave

The Bat Cave is located under Wayne Manor, the home of Bruce Wayne, which is in the outskirts of Gotham City. It's a fighting arena in Mortal Kombat vs. DC Universe.

The multi-tiered representation of the infamous Batcave where fighters can be bashed through the expensive arrays of equipment twice to initiate Free Fall Kombat until they reach the bottom level where the various Bat vehicles stand.

Apokolips

Apokolips is a world ruled by Darkseid which merged with Outworld. It's an arena in Mortal Kombat vs. DC Universe. It takes place between the MK and DC universe. It is the final arena of the game and you fight Dark Kahn at the end.

This outdoor arena, allows for infinite Free Fall Kombat transitions between various platforms.

Shinnok's Throne Room

Shinnok's Throne Room is a monastic arena located at the top of Shinnok's Spire within the Netherrealm.

Overview 

At the very top of Shinnok's Spire lies the throne of the fallen Elder GodShinnok himself. This chamber is also where the Brotherhood of Shadowssometimes come before this altar of malice to continued to worship their dark deity with such undying faith and loyalty.

This throne fully recharges Shinnok's mystical powers and also symbolizes his reign as supreme master of the Netherrealm.

The structure of the Throne of Shinnok also bears an almost similar resemblance to the Netherrealm'sKamidogu.

Shinnok's Spire

Shinnok's Spire or sometimes known as the Spire of Shinnok is a large structure present in the Netherrealm.

Overview

This massive temple was the home of the fallen Elder God Shinnok who controlled the entire dark realm from within the chambers of his sanctuary. it is revered as sacred by the wicked cult known as the Brotherhood of Shadows, worshippers of Shinnok.

The spire contained numerous floors which required special portals that allowed entry to the next level. A number of Wraiths and Demons were present within the Spire. The very top of the Spire was where Shinnok's throne roomwas present.

Walls of spikes are present where unweary travelers are capable of being killed on with canals of blood being present from those who have died.

Konquest Mode Challanges

Shinnok's Spire presents Taven with various challanges he has surprass in order to advance to the next level.

Destroy the glowing pillars: Within the ground level of Shinnok's Spire, Taven is confronted with the first challange. Destroying the glowing pillars in the room, while being attacked by a number of Demon Wards unleashed by Wraiths who summoned them, to shatter the hexagonal jewels on the wall and open the portal to the next level.

Kill the Imps to fill the meter: As soon as Taven gets to the second level he faces a Giant Summoner Daemon. Once a third of the Summoner Daemon's health has been lost he will recede from view and tiny Imps will appear. Using the mallet suplied the player must kill all the Imps to fill the meter. The process must be repeated untill the meter is filled.

Defeat Havik: Once in the third level Taven and Shinnok are confronted by Havik, who does not let them proced. Havik states that Shinnok will not regain control of anything as long as he draws breath. The statement enrages Taven who engages in Kombat.

Defeat all the Demon Warmongers: As Taven gets to the forth four he is confronted will Demon Warmongers which he has to defeat in order to advance.

Sever the limbs of the Demon Warmongers: Taven will be given a flaming sword in the fifth level in the form of a dark room so he can sever the limbs of the Demon Warmongers and proceed.

Defeat Sheeva and Kintaro: Arriving at the last level, the Shinnok's throne room, Taven will have to face Sheeva, who states the Spire belongs to her clan and the enraged Kintaro.

Shao Kahn's Throne Room

Shao Kahn's Throne Room is located within his stronghold in Outworld.

Overview

The Konqueror's throne room sits at the top level of his stronghold. The throne is designed to swivel so that he can look out of the 2 eye holes on the huge exterior skull helmet. The ceiling has retractable panels.

This throne room is quite different from the one that is a grand hall with spiked pillars and a stone throne at the end of the hall, and where Shao Kahn was supposedly killed at the hands of two treacherous sorcerers Quan Chi and Shang Tsung in Mortal Kombat: Deadly Alliance.

In Mortal Kombat vs. DC Universe, this level gets merged with Darkseid's throne room,and therefore takes a completely new look. Not only does each side have its own lower area accessible by Free Fall Kombat, but you can smash through the separating wall between them via Test Your Might.

Shao Kahn's Throne Room also appears in the upcoming Mortal Kombat (2011) game.

Scorpion's Lair (MK Armageddon)

Scorpion's Lair is an hidden arena in Mortal Kombat Armageddon, located in the Netherrealm. Like other Konquest stages, this arena has no Deathtraps or weapons. It is where the undead ninja warrior Scorpion keeps his captive prisoners and also where he fights the warriors he captured and transported them to this fighting arena of his.

Reiko's War Room

Reiko's War Room is located within Shao Kahn's Fortress in Outworld.

Overview

General Reiko's map room or he sometimes calls it "war room." The maps of every realm are stored on the wall.

Reiko's military advisors prepare the maps for each campaign as Reiko strategizes each plan of attack with Emperor Shao Kahn himself.

Red Dragon Caverns

The Red Dragon Caverns is located at Charred Mountain in Earthrealm.

Overview
This cave is not only the Red Dragon clan's headquarters but also home to the living 'Red Dragon' Caro.
They've conducted genetic experiments here by merging the DNA of Daegon's captive guardian Caro with that of Red Dragon Human test subjects using the Saurian Reptile's genetic material to aid in the merging process creating a race of Hybrid Dragons. Kano too was their prisoner here and being experimented against his will. But luckily he escaped before they can finish experimenting on him.
At the heart of the cave lies the Chamber of Daegon.
Taven came to these caverns and found answers for the reason why the Red Dragon were hunting him down. Then he reached the core of the cave he battled Reptile and rescued Caro from his imprisonment. While Taven gone searching for his brother in the Netherrealm. Caro was last left atoning for the abominable crimes that Daegon and his clan commited in his name by destroying the rest of the clan and their headquarters. His last fate is uncertain

Enemies
In Konquest mode the player can find the following enemies:

Hybrid Dragons

Sareena

Kia

Jataaka

Red Dragon Thugs

Reptile

Mavado

Relics

Fujin's Cape

Sareena's Sash

Daegon's Belt

Mavado's Hooks

Reptile's Medallion

Kenshi's Blindfold

Tanya's Choker

Musics

The following musics can be found via Konquest mode in in the Red Dragon Caverns:

Reptile's Lair's Tune

The Lost Pyramid ( Motor Kombat)'s Tune

Netherrealm Cliffs

The Netherrealm Cliffs is a dangerous location within the Netherrealm.

Overview

The Cliffs was a large fiery mountain with lava flowing down its surface. It was a required travel if one wished to reach Shinnok's Spire. This mountain was subject to numerous meteor impacts from large fireballs that crashed and wounded anyone that was near the impact region. Numerous gates were present which denied entry further down the cliffs but by manipulating the pressure plates, a traveller was capable of opening them. At the foot of the cliffs were lakes of lava. These giant rocky platforms at the cliffs were floatting because they were forever suspended by the concetrated dark magical powers of the fallenElder God Shinnok, the supreme master of the Netherrealm.

The largest arena in the game, with no death traps or destructible features.

Taven was teleported here by Caro, to search for his brother Daegon. In here he was forced to travel down the Cliffs whilst fighting the Undead and even the Oni Tormentor Drahmin in order to reach Shinnok.