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

This ancient burial site was once thought to be the home of a race distinctive to Ainu folklore.

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.

The world's longest tunnel with an undersea section.

The Yonaguni Monument, a natural formation or the Japanese Atlantis?

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

The ruin of a Japanese love hotel almost completely overgrown with brambles.

This ruined Japanese stripclub sits half burnt to the ground.

A steaming, boiling hellscape sources Hokkaido's thermal baths.

Coast along one of Japan’s mountain railways for coveted views of magnificent hydrangeas.

The world's largest drain sits below the city of Kasukabe, Japan.

A real-life replica of a home from Hayao Miyazaki's beloved movie "My Neighbor Totoro."

The 43-mile route crosses through six islands with gorgeous views of the Seto Inland Sea.

Shells collected from over a hundred different countries line the walls, floors and ceilings of this fantasy museum.

A Japanese corporation has turned this small island town into living modern art gallery.

Abandoned Japanese ghost town gives a glimpse into what our own metropolises may leave behind.

One of the first hotel rooms in a pod.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

The freshest fish here are the ones you catch yourself.

This historical theme park celebrates all things noodle.

This 700-year-old street food market features baby octopus and soy donuts.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

A taste of the macabre Tokyo's ritzy shopping district.