One in a pair of subterranean caves created by an ancient eruption of Mount Fuji.

Ruins and statues dot the landscape of this tiny island rich with royal history.

One of the world's largest ancient burial mounds.

The world's longest tunnel with an undersea section.

A thick blanket of beautiful pampas grass cloaks this unique Japanese landscape.

This historic hydroelectric power plant in Japan has been preserved and is open to the public.

Have a soak at this retro bathhouse, where you will find Japan's first electric bath, tiling from Spain, and wood carvings representing the Japanese invasion of Manchuria.

Narrow passes cut out of mountains surround the medieval capital of Japan.

What's believed to be the country's first shrine is, in Shintō mythology, the annual meeting place of the gods.

A small island with no monkeys but plenty of military ruins.

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

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

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

One of the tallest statues in the world, and the tallest statue of a goddess in Japan.

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

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

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

An abandoned Art Deco hotel nestled on the side of a wooded mountain.

The traditional houses along the coast of this charming Japanese fishing village allow people to sleep above the sea.

Elaborate series of tunnels where traces of mass suicide are still visible.

A network of sandy streets lined with verdant fukugi trees weaves throughout this tiny seaside town.

A mysterious set of tunnels carved in the hills of rural northern Kyushu.

Founded over a thousand years ago, this shrine is said to be built on the site of a warlord's harem prison.

Largest graveyard in all of Japan surrounds a famous mausoleum.