The loneliest island in New York.

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

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

An unassuming secret door once led to a legendary watering hole.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

Try not to get slimed in Tribeca.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This historic Victorian hotel has a scandalous history of affairs and murder.

This stately Victorian-era burial ground overlooking the Pacific Ocean is home to the graves of some of British Columbia's most famous figures.

Greenery cloaks this serene sculpture inspired by the famous Lost Gardens of Heligan.

Tour the original street level of Port Angeles, buried underground in 1914.

A monument stands at one of the starting lines of the Trans-Canada Highway, formerly the longest uninterrupted highway in the world.

This castle was once considered as an option for the Royal Family's alternate residence, but you may know it better from the 'X-Men' movie.

Outside this souvenir shop is a statue of Bigfoot composed of volcanic ash, and plenty more to see inside.

A short hike into the mountainside forest reveals a decaying 1890s town.

The only surviving piece of a submarine said to be the most decorated vessel in U.S. history.

A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

The first park built over a freeway is a brutalist masterwork.