These wondrously illuminated caverns extend under the mountains of the Fukushima Prefecture.

This brothel-turned-restaurant features plenty of surprises and elaborate, extravagant architecture.

More tin toys than you can shake a clapping monkey at.

This museum showcases the art of ancient sword-making.

A remote and slightly overgrown park filled with replicas of world landmarks.

Roots and stumps that lay inundated for two millennia are on display in Japan's city of three mysteries.

Shrine dedicated to boars that is believed to cure foot and leg injuries.

This giant bronze Buddha, the third largest in Japan, is the last in an ill-fated series of statues.

A dilapidated amusement park with a million-dollar view.

When this clock strikes a certain time, puppets showcase a story of life in Edo Japan.

The third-tallest statue in the world depicts the "Buddha of Infinite Light," complete with observation deck in his chest.

Hidden by the roadside in the Iya Valley, this gem brings together folk monsters and the region's unique geography.

Approximately 300 million years ago, a massive coral reef existed in what is now the largest limestone cave in Japan.

This mountain's identity is stuck somewhere between a nightmare and a scenic tourist attraction.

These unique toilets feature transparent glass covered in PDLC film.

Devoted Buddhists can earn enlightenment in the next life by crawling through this symbolic nostril.

A quaint amusement park now sits, rusting and forgotten among the foliage.

An anthropological theme park that depicts the cultures of around 20 different countries.

A 59-ft. robot statue looks over the citizens of earthquake-ravaged Kobe.

A small Japanese village claims to be the final resting place of the son of God (and God's other son's ear).

This Japanese Manneken Pis gets new outfits for every occasion.

Stuck in a bygone era, the oldest subterranean shopping street in Japan hides beneath the popular Asakusa district of Tokyo.

Existing for more than four centuries, the last of Hakone’s historic teahouses serves a sweet, mold-based rice drink.

Nestled in an unassuming residential area, this "forbidden forest" is rumored to spirit away those who dare to enter.