The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

Gargantuan home of Russian science.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

Two volcanic lakes in an enormous crater formed in a prehistoric eruption.

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

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

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

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.

An encyclopedic collection of mammal penises.

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

Walk in the footsteps of the gods and straddle two tectonic plates.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

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.

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.

Climbing Iceland's highest peak on the rim of the Oræfajökull volcano.

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

An isolated, rusty phone booth commemorates Iceland's first international telegraph cable.