Alien rock formations grown from the sands of an Australian national park.

A clear example of the process of erosion in action.

One of the best beaches in the entire world.

A sparkling sandstone cliffside that's worth a visit while it still exists.

Prehistoric park filled with the fossils of dozens of extinct species including Australian megafauna.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

The unique ecosystem atop an Australian mountain is home to some colorful inhabitants.

Australia's largest traditional hedge maze features a Great Gnome Hunt.

The tallest sea cliffs on the Southern Hemisphere are a climber's worst nightmare.

The only pollutant in the clear blue water is sunscreen.

A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

Woven tree art gives this towering Australian woodland a touch of mystical whimsy.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

Australian Lake set aglow by Noctiluca Scintillans.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

An Australian lake whose pink hue defies scientific explanation.

Natural rock water slides hidden in the remote forests of northern Idaho.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

Home to the deepest rift anywhere on Earth.

Remember that scene in the Matrix, when Neo is in the big white room with all the weapons flying by? Well, this is what it would look like if he had wanted trees instead of guns.

Beyond being incredibly fun, not much can be said about the Hole with certitude.

At the base of Steens Mountain resides an otherworldly desert.

A sprawling cave network created by a lone lava tube.