New York City

New York City is where Percy Jackson, the main character of Percy Jackson and the Olympians, lives and attends school and Camp Half-Blood (located on Long Island). Olympus is located on the mystical 600th floor of the Empire State Building. A large amount of the series takes place there.

The Last Olympian
The fight between the demigods and Kronos's army is located in Manhattan. During the fight, the island is magically separated from the rest of New York.

The Empire State Building
The Empire State Building is the new home of the Olympian gods, as Olympus floats above it. Percy visits this building many times during the series to visit the gods.

The Brooklyn Battery Tunnel
The Brooklyn Battery Tunnel, officially known as the Hugh L. Carey Tunnelis a tunnel, is a toll road in Manhattan. It runs under the East River and connects the Brooklyn borough to the Manhattan borough. In The Last Olympian during the Battle of Manhattan, the Demeter cabin was sent to guard the Brooklyn Battery Tunnel. The Demeter campers grew thorns and poison ivy to keep the monsters at bay.

Queens-Midtown Tunnel
The Queens-Midtown Tunnel (sometimes simply known as the Midtown Tunnel) is a highway tunnel and toll road. It crosses under the East River and connects the Borough of Queens (at the Long Island City terminus of I-495) on Long Island with the borough of Manhattan.

In The Last Olympian, during the Battle of Manhattan, the Aphrodite cabin were sent to guard this tunnel. The perfume Givenchy (which apparently monsters hate the smell of) may have been sprayed in this tunnel to keep the Titan Army away.

Williamsburg Bridge
The Williamsburg Bridge is a bridge in the city of Manhattan. In The Last Olympian, during ﻿the Battle of Manhattan, the Apollo cabin was sent to defend the Williamsburg Bridge. When the Apollo cabin (with the help of Percy Jackson and Annabeth Chase) drove back the Titan army, Kronos engaged Percy Jackson in a duel. During this duel, Kronos sent a wave of energy that almost destroyed the bridge. Percy summoned his power to destroy the bridge completely, stopping Kronos from proceeding to Manhattan. However, Micheal Yew disappeared and is presumed dead.

The Holland Tunnel
The Holland Tunnel is a highway tunnel under the Hudson River connecting the island of Manhattan in New York City with Jersey City. In The Last Olympian, during ﻿the Battle of Manhattan, the Hephaestus cabin was positioned here. The campers left traps and used Greek fire to defend the tunnel and Manhattan.

The Hudson River
The Hudson River is a river surrounding the island of Manhattan. The spirit of the river dislikes Percy and The East River spirit. He is very polluted.

The East River
The East River is the other river surrounding the island of Manhattan. The spirit of the river dislikes Percy and is a rival of The Hudson River spirit. He is also known to be very polluted.

Trivia

 * While not mentioned in the series itself the borough Manhattan, where the Olympians live, is avoided by certain other groups.
 * The Williamsburg Bridge is the scene of some important events such as:
 * the disappearance of Michael Yew, head counselor of the Apollo cabin
 * the second defeat of the Minotaur by Percy Jackson