A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.

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

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

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

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

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

This canyon is comprised of gorgeous waters and magnificent basalt columns.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

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

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

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

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

A restaurant devoted to "trouser grip" wrestling, an ancient form of Viking wrestling that is Iceland's national sport.

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.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

The world's largest sundial can cast a shadow more than 1,600 feet long.

A statue of a boy looks up at where the famous rival to the Leaning Tower of Pisa once stood.

These abandoned country fairgrounds are filled with replicas of Spanish monuments.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

Guitarist Paco de Lucía overlooks travelers as they pass through this train station dedicated to his legacy.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.