Legends surround an ancient tree trunk riddled with nails for good luck.

Baroque celebration of the end of the Great Plague of Vienna.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Devoted Buddhists can earn enlightenment in the next life by crawling through this symbolic nostril.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

Home of the first female Hungarian poet, where her secret writing lay hidden for over a century.

A medieval church built up to defend its village.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Largest lake in Great Britain measured by surface area.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

A scattered trail of street art adds a pop of color to the city's stark structures.

An icon of the Battle of Britain is frozen in flight in a grand Victorian museum.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

These ruins have been linked to a sherbet factory that exploded, but the story may be entirely fictional.

The abandoned transportation hub hides within the Glasgow attraction it once served.

Glasgow's own "tipsy" temperance monument.

Inside this art museum resides one of Glasgow's most famous musical instruments.

The former home of the world-famous Templeton Carpet Factory.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.