The summer tourists on these cliffs are thousands of seabirds.

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

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

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

Three million year old fossils are exposed for all to see on this Icelandic shore.

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

This mountain fissure hides a secret path to a secluded mossy grotto within the rock itself.

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

Three columns of volcanic rock shoot out of the ocean.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

This replica Viking village was created for a film that was never shot and is now open to visitors.

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

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

A little-visited waterfall in an otherworldly landscape.

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.

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

An encyclopedic collection of mammal penises.

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.

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

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

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