Mozart's skull may be held in this collection, but definitive proof continues to elude scientists.

A neo-Gothic mansion now houses a wunderkammer of analog tech that hits on all the senses.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

The true meaning behind this sculpture remains unknown.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

A forgotten graveyard lost in the tangles of an overgrown garden.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

This church houses the “incorrupt” body of its founding Bishop.

The site of the one of the most deadly train wrecks in American history.

The small cave that housed Tennessee's "first citizen."

Just like the real 36th president of the United States, animatronic LBJ amuses visitors with jokes and stories.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

It's a pretty creepy lock-up.

12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

The rare American Civil War-era weapon was never fired in anger.

The first and only carousel with a lineup entirely of insects.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

During the holidays, a vintage subway train whisks New Yorkers back in time.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.