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

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

This beautiful, historic church looks like something out of a simpler past.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

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.

Three columns of volcanic rock shoot out of the ocean.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

A breathtaking viewing platform over the Alps.

A hugely vast Irish landscape of barren rock that stretches for miles.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

One part local history, 99 parts gruesome haunted house.

Preserved "bog person" that is over 2,000 years old.

This Danish rock field is actually a sprawling ancient cemetery holding the bodies of 700 Vikings.

This historic little railroad runs through some of the most beautiful scenery in Germany.

Despite the groans of archaeologists, this astounding groups of Bronze Age petroglyphs have been painted red for tourists.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

A Neolithic celestial calendar standing in a nondescript wheat field.

The most visited, and possibly most controversial, museum in Germany.

This enchanting mountain plateau celebrates spooky local folklore.

The beautiful, ornate weather station is the most popular geocache in Salzburg.