This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

A Neolithic celestial calendar standing in a nondescript wheat field.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Amsterdam's Red Light District leaves little to the imagination.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

A whimsical bridge adorned with decorative dragons.

This abandoned Slovenian military barracks has become a punky-political art squat.

The "dragon babies" of southeastern Europe.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

A miniature train-ride through Slovenia's largest cave system.

A Romanesque tower appears when water levels drop.

This lurid German fountain plots the sad course of marriage from dating to death.

Nestled on the banks of a river in Nuremberg is a small museum that was once home of the city's official executioner.

A museum and shop on Bourbon Street located in the French Quarter.

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

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

A guitar mounted on a wall in Temple Bar honors the Irish musician.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

Northern Ireland's Brobdingnagian stepping stones.

A mysterious Neolithic tomb is perched along the edge of a modern golf course.

This record shop and unofficial black metal museum is an ode to Oslo's heaviest musical export.