It's possible to walk inside one of the largest Neolithic tombs in Britain.

The only pub in the world surrounded by an ancient stone circle.

Europe's largest prehistoric mound – burial site of a legendary king?

The largest stone circle in the world has ended up bringing up more questions than it has answered.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

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

A cathedral resurrected from the ashes of one of Europe's greatest urban fires.

Pigduck of Turku.

These Finnish rapids have been attracting tourists for over a hundred years and are now released with the push of a button.

Fortifications built for a Soviet invasion that never came now sit abandoned in a losing battle against nature.

Collection of nearly 500 concrete figures sculpted by the late Veijo Rönkkönen.

Legend has this precariously placed rock was placed by giants. Science has another explanation.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

The world's oldest known salt mine.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Apartment complexes built into huge repurposed natural gas tanks.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

The final resting place for the remains of 143 Habsburg royalty.