A 70-foot-deep ice cave formed by lava from Mt. Fuji on the edge of Japan's "Suicide Forest." 

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

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

Reportedly 1,400 years old, this may be the first of the Fiji Mermaids.

A monk-run winery inside a Buddhist temple celebrates Japan's crown grape varietal.

According to one legend, this bridge was crafted after monkeys formed a body-bridge across the gorge.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

Launch site for nuclear war against Western Europe.

This lakeside bunker complex in Mamerki, Poland, housed the Supreme Military Command of Nazi Germany during World War II.

This formerly-prosperous Silesian mining town was completely demolished in the late 1960s and early 1970s as an attempt to cover up a secret Soviet uranium mine.

The center of this Polish border town was so thoroughly wiped out in World War II that only the foundations remain.

An extensive network of secret tunnels was created for the Nazi project "Riese."

A collection of modern and vintage pinball machines housed in the cellar of a 15th-century building.

A stone in Wolin, Poland, marks the possible location of a legendary Viking fortress.

Come to this Polish museum to take a good, clean look at filth.

A small granite monument marks where the borders of three countries meet.

This extensive collection covers thousands of years of Polish military history.

A monument to Poland's famous alleged UFO abduction case.

This open-air museum was originally a World War II testing ground for German missiles and rockets.

One of only two places in the world where two rivers cross each other without the waters mixing.

This picturesque castle in Poland has a rich history, including a legend that ties it to lost Incan treasures.

An abandoned Jewish sanatorium is tucked within the woods of Poland.

Deep in a Polish forest, this collection of Iron Age megaliths still holds onto many of its ancient secrets.