Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Three columns of volcanic rock shoot out of the ocean.

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

This stunning concert hall has become a symbol of Iceland's national recovery.

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 medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

The highest peak in all of England is plagued by dangerously fickle climate shifts.

Huge winged monument in the United Kingdom.

Eighteenth-century home, where Herschel discovered the planet Uranus.

This silent sentry in the crypt below a large Gothic cathedral is often knee-deep in water.

A perfectly running 230-year-old silver automaton and music box.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

Fascinating town where normal life interfaces with the occult.

England's most notorious suicide spot.

The largest greenhouse in the world is home to over one million types of plants.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

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

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

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

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

This disused Cold War bunker has been restored to all of its early 60s glory.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.