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

A little-visited waterfall in an otherworldly landscape.

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

A winding, blood-red tunnel of hardened lava navigable by foot.

Climb right into the heart of this colorful Iceland volcano.

The most powerful waterfall in all of Europe.

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

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

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

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

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

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

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

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

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

Rising from the sea like a stone monster.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

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

Replica of mosque destroyed by Russia in the 16th century.

A remote forest of stone pillars along the Lena river.

The tallest hotel in Europe.

Abandoned castle was once a grand example of Russian privilege, built exclusively to win a frivolous bet between noblemen.

The world's second-largest excavated hole.

The reason for the strange contortions in the trunks of these "drunken" pine trees in Russia is still a mystery.