A whimsical bridge adorned with decorative dragons.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Where the lovelorn find a home for their sentimental keepsakes.

This 135-year-old weather station studied the effects of the climate on human health.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

At this archaeological site, visitors can explore the ruins of the capital of the former Roman province of Moesia.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

The bizarre rocks of Đavolja Varoš are the result of natural erosion.

The world's most active stratovolcano is almost always erupting.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

A subterranean house of worship carved right out of the bedrock.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

A bit of the Berlin Wall was gifted to the Icelandic capital to commemorate the 25th anniversary of German reunification.

An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.

A hidden stream deep in the mountains creates one of the largest tufa waterfalls in Serbia.

Legends of treasure and spirits flow from this this fairy tale-like oasis.

This 15th-century Serbian Orthodox monastery also contained a school for illuminating manuscripts.

Once part of an ancient international harbor, it's now an all-you-can-eat shrimp buffet for flamingos and other water birds.