One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Fossils, railroads, and waterfalls!

Few other hotels can rival the grandeur of the Castle in the Rockies.

A medieval village holds a very modern hotel.

Surrounded by ash fields in Iceland, an impossibly verdant valley looks like something out of a fairytale.

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

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

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

Three columns of volcanic rock shoot out of the ocean.

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

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

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

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

The most powerful waterfall in all of Europe.

An encyclopedic collection of mammal penises.

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

Rising from the sea like a stone monster.

Neo-cave art on the macro scale.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Medicinal spa created with the discharge from a geothermal energy plant.

Near the mouth of the Yodo River, this museum offers visitors six floors of hands-on learning about Osaka's raw sewage.