One of downtown Berlin's last reminders of its Communist past.

This "floating railway" is one of the world's oldest monorail systems.

A wunderkammer of mysterious objects and stories.

Open since 1977, this small museum is filled with a lifetime of finds from a tireless traveler and collector.

This impressive chasm is one of the longest natural underground cavities in the world.

Wander among free-roaming storks at the sanctuary that helped save them from local extinction.

This bunker in northern France was built by Nazi German forces with the intention of launching up to 50 V2 rockets at London each day.

This stone quarry was used to make axes and other tools more than 6,000 years ago.

Europe's largest community of crocodiles and alligators.

Admire endangered plants in a verdant garden that looks straight out of a Monet painting.

At this monastery, monks make raw-milk cheese and use excess whey to create methane that powers their hot-water system.

Thousands of flamingos and other bird species flourish in these Camargue wetlands.

Home to the "Rat King" of Nantes and other wonders of the natural world.

A granite rock formation littered with various species of moss, lichen, and fern.

These colorful French islands spent a stint bootlegging booze during American Prohibition.

An often-shuddersome journey into a low-tech, robotic themepark.

This crack in France's seaside cliffs once hid a sinister secret.

Tens of thousands of ancient rock carvings hidden in the heart of a French national park.

A unique zoological park home to over 30 species of wild cats, both big and small.

This collection of French root art looks like an indoor fairy wonderland.

Nicknamed the "Museum of Horrors," this French anatomical collection has been fascinating visitors for over a century.

This professional clown's home is an outsider art wonderland.

An enchanting work of outsider art, full of whimsical sculptures and carvings.

A public park off the beaten path with a beautiful waterfall and 13th century Cistercian abbey.