The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

Wading through a small lagoon reveals a secret, wild stretch of pristine beach.

This scenic spot is known as the birthplace of Switzerland.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

The World Wide Web was created in this nondescript corridor at CERN.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

Water mills built into a cave in the 17th century are powered by a subterranean river.

This museum is also an active archeological site at the eastern end of Lake Neuchâtel.

In memory of The Blur Building, the temporary exhibition pavilion of vaporous nothingness.

Museum of science fiction, utopias, and extraordinary journeys of the mind.

Over 3km of caverns and caves at the Switzerland-France border contain the largest underground river in Central Europe.

Berlin's old airport.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Each of these hand-painted wooden boxes, which date to between the 16th and 19th centuries, contains a genuine human skull.

This might be the world’s tallest Bronze Age standing stone.

An isolated 17th-century chapel on a remarkable site once dedicated to Celtic sun worship.

If they push on just the right spot, even the weakest person can move this titanic boulder.

A remote hilltop covered in giant monoliths haunts the Brittany countryside.

A small house sits between two huge rocks, with its back to the sea.

The precise origins of this pink sandstone temple are unknown.