Countless grotesque faces stare out from this eerie Prague art wall.

Macabre astrological automaton clock dating to the late 1400s.

A church of bones, decorated with 40,000 human skeletons.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

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

A trio of hidden hot tubs takes advantage of Iceland's natural geothermal vents.

Staves, storm-calling, and of course, necropants.

These ominous lava formations were said to be an entrance to the netherworld so of course they inspired a famous metal band.

This elegant arc of a waterfall marks a religious turning point.

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

A sulfuric martian landscape that looks far better than it smells.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

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

Inside this museum, visitors venture through ghost stories entrenched in Icelandic folklore.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

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

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

A giant red chair bolted to a rock on a remote mossy hillside in Iceland.

This modern monument to pagan belief looks like it was transported straight from ancient times.

The most powerful waterfall in all of Europe.