Museum showcases Japanese sexuality and some amazing ocean views.

An ingenious solution to a tricky engineering problem, this spiraling bridge takes drivers for a dizzying spin.

The highest bridge in the world rises a dizzying 1,854 feet above the river.

Tiny historical streetcars wind through a small scale version of Crescent City in this whimsical train garden.

These hellish-looking cliffs in the Canadian Arctic have been burning for centuries.

A boiling wellspring flowing with natural gas burns in a continual blaze.

A natural gas leak provides a flickering flame beneath a waterfall.

A coal fire has been burning underground here since 1896.

Flames have been burning within this mountain for more than 2,500 years.

A shrine of fire worship built on top of a natural flame.

6000-year-old coal fire moves one meter per year.

Mysterious hillside with a continuously burning natural fire.

A fiery crater has been burning in the Karakum Desert since 1971.

Think you have a tough job? Try carrying 200 kilos through a cloud of sulfur down the side of a volcano.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

The biblical sculpture honors those who lost their lives, homes and communities to the Chernobyl disaster.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

A toxic ghost town sitting atop a massive coal fire.

This former power station is now a museum dedicated to the region's coal-producing history.

This former coal mine, now a fascinating museum, was the site of Belgium's worst mining disaster.

The site of the worst mining disaster in Ohio's history.

This park and coal mine heritage site is home to two of the last steam winding engines in the UK.

These early 19th-century kilns were used to make coke, a key Ingredient in steel production.