Earth

Earth, also referred to as "the Ground", is the homeworld of humanity. The story starts in September 2149, 97 years after a devastating nuclear apocalypse was caused by an A.I. called, "A.L.I.E.". While much of the ground recovered, with vibrant plant and animal life, atmospheric radiation levels remained at a significant level, only unaffecting those who have adapted to radiation.

Survivors in space believed Earth to be uninhabitable, but after a critical system failure in the Ark's life support systems, the 100 were sent to the surface in a last-ditch attempt to determine if Earth is habitable again. There they discovered that the Grounders have been living on the ground for generations. Throughout the first, second and third seasons, various factions, including Grounders, Sky People, Mountain Men, and A.L.I.E. fight for control of the ground.

Environment
On May 10, 2052, A.L.I.E. initiated the Nuclear Apocalypse that devastated the planet and drove humanity to near extinction. Over the following 97 years, much of the planet had recovered but became a very different place. Ecosystems changed, landscapes were reshaped, and life adapted. Much of the infrastructure had been destroyed or decayed. Lush forests grew throughout much of the Baltimore–Washington metropolitan area while further north became a wasteland.

Major Locations Edit

 * Delinquents' Camp
 * Polis
 * Tondc (includes Lincoln Memorial)
 * Mount Weather (includes mines and Philpott Dam)
 * Arkadia
 * Dead Zone
 * Becca's Island

Finn's Bunker
The name given to a bomb shelter discovered by Finn Collins. The bunker's original purpose was to serve as a shelter from nuclear bombs in the case of an apocalypse, but the owners possibly never made it. It was mentioned by Finn that he had found it back when the delinquents first landed on the ground. Finn, John Murphy and Wells Jaha take refuge here when Mount Weather releases the Acid Fog during the mission to the signal tower.

Sontaim Cliff
In "Sibling Reconvention", Kent Griffin takes his biological sister, Clarke Griffin, to a cliff from his childhood. The cliff is a beautiful spot where flowers have mutated with the trees, resulting in the trunks blooming with flower heads. Kent answers Clarke's question about how he found it by saying that Costia had been the one who discovered the spot. He reveals that Costia, Lexa, and himself came to the cliff during the summer season and jumped into the lake below. Kent also points Clarke to the distant fire-light of the pyre atop the Commander's tower in Polis, the capital of the Grounders. Clarke spots the Acid Fog from the cliff and Kent uses his foghorn to warn all of those in hearing distance. This cliff is also where Kent and Clarke connect as brother and sister before Reaper Onian finds them after following the sound of Kent's foghorn. Kent and Clarke jump off the cliff and into the lake to escape.

Depot Ruins
In "Decisions, Collisions & Prophetic Visions", Bellamy Blake and Octavia Blake come across ruins. They search and find a door to the depot. Inside, they find barrels full of grease and guns. Most of the bullets are stubs unfortunately. They also find blankets as Dax stalks them. Bellamy becomes affected by Jobi Nuts and hallucinates his mother, Aurora, who denies Bellamy's plea for her to kill him; when really it's his way of torturing himself. Dax attempts to shoot and kill Bellamy, however the gun is defective and Octavia arrives in time to kill Dax by stabbing him in the neck.

Racus
The name of an Azgeda village, located in the ruins of Syracuse, New York. Nia meets with Diana Sydney in Nia's visiting house.

Falo
The name of an Azgeda village, located in the ruins of Buffalo, New York. The Exodus ship, that Diana Sydney and her followers stole from the Ark, lands here. The village is completely flattened and all of the residents were killed.

Parking Garage
In "Fog of War", it was found by Octavia. The garage was abandoned, during the nuclear apocalypse, leaving behind many cars. Reapers have access to the garage, as seen when Bellamy, Octavia and Lincoln when they find Onian. It is once again abandoned when the three of them manage to knock out Onian and take him to the Dropship.

It is mentioned by Bellamy in "Don't Fear the Reaper", when he, Kent and Onian are on their way to infiltrate Mount Weather.

National Zoo
In "The Pauna and the Frogs", Lexa, Lexa's bodyguard and Clarke stumble across the ruins of the National Zoo when crawling through an old sewer grate, while running from Pauna. The zoo is Pauna's (Gorilla's) "Feeding grounds." Pauna kills Lexa's Bodyguard and Clarke shoots it multiple times. Pauna awakes from her wounds, and Clarke and Lexa jump over a railing and flee into a holding cage, where Clarke locks them both in. They manage to escape, locking Pauna up for a while.

Other Minor Locations

 * Unnamed Tondc Village
 * Eden's Pass