Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

After millennia of erosion by sand and churning water this Brazilian valley now looks like a lunar fantasy.

A massive natural rock arch gives the Tuscan mountain its own window to the sky.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

This extraordinary geological oddity resembles human-made pavement.

Fourteen curious and controversial white bunnies sit in a circle near Newport Beach City Hall.

This isolated island is often capped by its own fluffy cloud.

This amazing 15th-century mural remained hidden in plain sight for centuries.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

An enchanting rocky island of scraggly baobabs surrounded by an ancient sea and sprawling salt pans.

Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

No one's quite sure why there's a metal megaphone bolted on two rocks in the middle of the Mojave Desert.

In the middle of a remote desert town is a surprisingly opulent hotel.

You can row a boat through this ancient underground reservoir.

This dizzying span over the ancient Algerian city was once the highest suspension bridge in the world.

When Azorean green tea meets volcanic hot springs water, a luminous brew is born.

Rare recess caves fill this unbelievably beautiful Ohio park.

A spectacular hidden beach in Ireland has the dark, disturbing nickname of "Murder Hole Beach."

The steel cable lets adventurers zoom between two mountain towns at speeds of up to 75 miles per hour.

Spend the night in this formerly abandoned traditional Scottish village.

Visit this playground of waterfalls, caves and sinkholes.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.