These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

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

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

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

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

Step inside Lucy, the world's largest "elephant."

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

This giant disembodied horse head seems to balance impossibly on its nose.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

See some of the world's greatest racing horses at this idyllic thoroughbred breeding facility and garden complex.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

Go inside to really appreciate this 500-year-old technological masterpiece.

Fantastic views and thousands of love locks.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

It's good luck to be mocked by this monkey.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A small but immensely extravagant palace built by the "Night King."

This private residence was the template for one of the most beloved television homes of all time.