Rippling sand dunes frozen in the Arizona rock.

An autonomous oak in Alabama.

148 feet long and in the middle of a verdant forest.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

The only diamond mine in the world where you can keep what you find.

One Costa Rican island is so beset by illegal shark poachers that the local rangers have built an entire bridge with their confiscated gear .

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

This Costa Rican topiary park is a surreal garden of unearthly delights.

This collection of historical artifacts and tropical wildlife waits just beneath the surface of the water.

South Africa's postal service began with a letter left in a boot beneath this tree.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

Museum of Fijian history, including its former tradition of cannibalism.

The most powerful waterfall in all of Europe.

Puffin enthusiasts flock to Europe's largest seabird cliff, which over one million birds call home.

The oldest steel ship in Iceland has been beached for years and is now a rusting ruin.

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

The summer tourists on these cliffs are thousands of seabirds.

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

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

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

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

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

These eerie outliers of the lightning bug family glow a mysterious blue color.

This bridge is haunted by the ghost of a distraught mother.