Warsaw's fantastically preserved gasworks...almost.

The world's first and only escalator for lazy bicycles and their daunted riders.

The world's northernmost aquarium looks like it has fallen over.

Once a major stop on the Hejaz Railway, this desert station (complete with steam locomotive) has been abandoned for decades.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

A giant portrait of an ancient king looms over the river.

This once-derelict building is now one of the most beautiful bookstores in the world.

A naturally occurring tunnel in this Nordic mountain makes it look like it's been shot.

Home to the abandoned Tioronda Hat Works Factory, this park is a combination of woodlands and marshlands.

The remains of what was once the world's steepest passenger funicular.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The world's largest underwater restaurant is submerged off the southern tip of Norway.

Norway has built what may be the world's most beautiful public toilet.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

The rusting hulk of a hand-powered, nearly 160-year-old submarine abandoned in 1869 due to the ravages of decompression sickness.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

A former Canadian automobile ferry mysteriously appeared in the Black River 20 years ago, and now it quietly rusts away.

An out-of-the-way wildlife haven with a rich and storied past of harboring thousands of fugitive slaves, or "Maroons" during the mid 1800s.

Once a welcome symbol for maritime travelers entering Edrom.

The site where whalers teamed up with orcas to hunt baleen whales.

A microcosm of the whaling industry in a small Australian town.

These sea cliffs are an epic natural wonder.