It is cut off from the rest of the world and is surrounded by an enchanted force field to keep all the island's devious inhabitants from leaving, disabling their magic, and preventing more than one channel on the televisions from showing. It is unknown what exactly will happen should an inhabitant attempt to leave the island while the barrier is active; likely it would be similar to running into a wall.
The island interior mainly resembles a slum. Because they only get the unwanted or used products of Auradon, the Isle is also known as the Island of the Leftovers.
When Beast and Belle married, twenty years before the film takes place, Beast rounded up all the kingdoms into the United States of Auradon, banishing all the evil villains and sidekicks to the Isle of the Lost protected by a forcefield; this made it impossible to escape. Stripped of their powers, the villains lived in total isolation and forgotten by the rest of the world.
The only school on the island, located in a re-purposed tomb. It teaches the children of the island the ways of wickedness, encouraging them to do better than they did and be ready for the day the barrier falls. With the exception of the wizard Yen Sid, the staff is made of famous villains.
The only dock on the island, where ships bring in products and food from Auradon. It is manned by Goblins who can understand human speech. Many of them wish for amnesty, blaming their imprisonment on the island to their previous servitude with Maleficent; their dwarf cousin Doc understands their plight. Jay swipes party goods from the dock for the party at Hell Hall that Mal forced Carlos to have.
A shop that sells used enchanter robes and pointed hats. The top floor serves as home to Maleficent and Mal. Mal's room is gothic in shades of purple. Maleficent hasn't quite adapted to life on the island as she doesn't keep her home stocked with food, and thinks her refrigerator is a safe.
Jafar's Junk Shop
A shop selling whatever is pilfered, rip off the customers. It serves as home to Jafar and Jay. Jay stocks the store by stealing whenever he's out. There are many locks, due to thieves believing in keeping their own home safe.
Castle Far Away
A poorly kept home, belonging to the Evil Queen and Evie. For a decade, it served as their prison after Maleficent unreasonably said they were banished for simply not inviting Mal to Evie's 6th birthday party.
Home of Cruella and Carlos De Vil. The home is maintained by Carlos, who is practically his mother's slave. He keeps a tree house lab, where he experiments in his free time. Horace and Jasper's sons Harold and Jason are forced to spend time here as Carlos's fake friends/minions.
Ursula's Fish and Chips
A shop ironically owned by Ursula, which serves fish and fries. Jay and Mal pilfered goods from her.
Isle of the Doomed
Hidden next to the Isle of the Lost is another island, where the Forbidden Fortress crumbles away. The fortress is now surrounded by thorns and poisonous spiders. It was here that Diablo, Maleficent's beloved familiar came back to life after Carlos's invention caused a brief hole in the barrier. Many traps were reactivated and proved a hindrance to Mal's attempt to retrieve her mother's staff; this includes the Cave of Wonders, a magic mirror, and gargoyle sentries. Many of the goblins that served Maleficent still remain on the island, but have devolved into cannibals for the years of isolation.