A long-forgotten Victorian swimming hole is still a fun spot for a dip.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

This museum sits on the site of a decommissioned military communications base.

A taste of Middle Earth, in the middle of the Bayou City.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Get past the gatekeeper's apartment and enter an elaborate hoax of a restaurant with a Masonic feel.

Summer in Scotland begins with a spectacularly wild and colorful event rooted in ancient pagan traditions.

Bathe in these natural hot springs located high in the Andes Mountains.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

You haven’t properly toured a winery until you’ve slept in an actual wine barrel.

There’s a hidden military meme engraved on the World War II Memorial.

A magical place that lets you play in and explore the world of Studio Ghibli.

The oldest operating pharmacy in the world features 800-year-old recipes.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

These pillars at the main entrance of this church are actually a hidden musical instrument.

After giving up Michelin glamour for his Amish faith, one chef now makes stellar sausages in a small, off-the-grid shop.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

Get up close and personal with these majestic fish.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

You can spend the night in Dr. Frank-N-Furter's castle.