The fairy tale castle of the "fairy-tale king."

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Rippling sand dunes frozen in the Arizona rock.

A huge musical instrument played by the ocean.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

World's largest collection of serial killer artwork and other macabre exhibits.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

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.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A dilapidated dock tells the story of Titanic's missed arrival.

A 30-acre garden inspired by the principles of modern physics.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

A collection of haunted objects and macabre oddities under one roof.