Jamestown

Jamestown, Virginia was the location of Thalia, Luke, and Annabeth's old safe house. It's unknown what happened to it after the trio were found by Grover, or before Thalia and Luke found it. It is presumably abandoned. Percy, Annabeth, and Tyson hide in the safehouse in The Sea of Monsters when they were unexpectedly seen by a U.S. Coast Guard naval ship.