One of only two commuter aerial tramways in the United States.

The front yard of an Upper East Side town house hides the last fragment of one of New York's most famous theatres.

For 20 years, local pumpkins have met their fate on the iron fence surrounding this Cobble Hill home.

A crumbling hospital from the 1850s on Roosevelt Island.

Mysterious 500-year-old tapestries depict a unicorn hunt.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

The national park was once a plantation estate.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

This pun was simply waiting to come to life, and one defense contractor made it so.

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 Upper East Side apartment co-op was designed as a tuberculosis sanitarium.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

A celebrity from the late Cretaceous period.

It was once the base for a series of domestic terror attacks.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A colorful square marks the heart of the city's LGBTQ community.

This angular brutalist playground turns playtime into modern art time.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Eighteen miniature death-scene dioramas.