A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

Peek through the gates at this oasis from the city, full of Old English charm.

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

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

These lush botanical gardens employ the most purrfect pest control force.

Locals call this magical moss-covered walkway the "Emerald Path."

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This might just be the TARDIS of bookstores.

The oldest surviving botanic garden in the United States.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

Where America's first doomsday cult awaited the end of the world.

A toxic ghost town sitting atop a massive coal fire.

World's first "penitentiary," meant to be humane, drove men insane.

The oldest bookstore in Iceland.

A fantastic reconstruction of a 10th-century Viking longhouse.

This verdant, tree-lined Reykjavik graveyard is both enchanting and eerie.

Iceland: home to volcanoes, waterfalls and, apparently, Santa?