This might just be the TARDIS of bookstores.

An outlandish shoe shaped house built by an eccentric millionaire.

Enormous lake at the bottom of a unique cave system.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

Home to items never before seen by the public.

Waterway populated with abandoned projects, including a submarine.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

Steepest flood safety railway in the entire world.

Plot your trip through the city on the sidewalk.

The site of the deadly Triangle Shirtwaist Factory Fire.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

A 9-story, poured concrete structure which was used as a glue factory with an indelible smell.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

2 square block factory in Greenpoint erected in 1936.

Nondescript building owned by ExxonMobil working on siphoning Greenpoint Oil Spill out of the ground.

A 120-year oil leak slowly unleashes more gallons of oil than the Exxon/Mobil disaster.

A modern addition to the Greenpoint skyline.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.