A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

Less a museum than a bizarre fantasy world created by artists and engineers.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Renaissance villa and gardens complete with a tormented colossus.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Iceland's largest lagoon is home to stunning multi-colored icebergs.

An acoustic anomaly with a mysterious cause.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

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

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Quite simply the largest tree in the world (by volume).

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

The 10,000 Torii shrine.

Rainbow-hued local gem in Venice.