The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

A curious collection dedicated to human and animal anatomy and pathology.

An Aztec snake god has taken the material form of an apartment complex.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Home to items never before seen by the public.

A battle between nature and architecture in the Cambodian jungle.

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

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Read a book next to a Midtown waterfall.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

This lab's maddening silence is good for business but bad for sanity.

A seemingly endless landscape of pure salt stretches far across Bolivia.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Ruins of a German Castle on top of a towering stone pillar.