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.

A strip of traditional hand towel serves as an admission ticket at this modern tenugui museum.

The magical, mossy forest that inspired 'Princess Mononoke.'

A sobering scientific reminder of the human damage caused by the advent of the nuclear age.

A hub of information on tropical diseases and their treatments.

Japan's hottest hot spring has a memorable name.

Buried nine feet under, these houses are preserved as a stark reminder of the disastrous 1991 Unzen eruption.

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

This serene, turquoise lake in an extraordinary nature reserve showcases a rare natural phenomenon.

Enormous sandstone towers loom within a Czech forest.

Naturally formed rock city in Poland.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

A breathtaking viewing platform over the Alps.

The world's oldest known salt mine.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

Tall columns of volcanic basalt make up this improbable-seeming rock formation.

Bohemian paradise covered in majestic forests.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.