The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

This sun-scorched lakebed contains samples of half the natural elements known to humankind.

A unique geological area spiked with wind-carved rocks that resemble teepees.

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

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

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

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

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

The most powerful waterfall in all of Europe.

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

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

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

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

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

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

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

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.

Rising from the sea like a stone monster.

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

One of only two places in the world where two rivers cross each other without the waters mixing.

An undulating wicker beast looms peacefully atop a sand dune in Belgium.