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

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.

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

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

A Hawaiian stairway to heaven—that you can't climb.

Tubing through a cave lit with glowworms is a magical underground experience.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

The beautiful baroque library of the Hapsburg empire.

Pompeii's less famous neighbor is still revealing her secrets.

The most alien-looking place on Earth.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A gargantuan crystal kingdom.

A swing to dangle you off the very edge.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The rocks in this arid basin leave trails of movement behind them.

This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A naturally beautiful, seemingly bottomless deep blue spring.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

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

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.