Geology

A midcentury ranch house hides a literal treasure trove of unique rocks and minerals.

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

Western Europe's only representation of a Roman goddess still in its original location sits in an unassuming park.

The largest geyser field in the southern hemisphere is a spectacular sight.

This sacred, circular cave is lined with pools so clear and still that it's hard to tell where the water begins.

Thousands of unique minerals, including some of the most impressive fluorite crystals in the world.

Left by the Devil, an ancient quarry or just plain old erosion, this enigmatic rock pillar rises 28 feet from the hillside.

Massive mounds of golden sand look like a desert landscape randomly plopped in an Arctic forest.

Did Inca children also slide down these smooth rocky slopes above Cusco?

At 705 feet high, Brazil's "House of Stone" is the largest cave mouth in the world.

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

These two giant boulders mysteriously perched on a 60-foot cliff may have been slung up there by a raging tsunami.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

A public display of prehistoric space rocks is named for the Namibian village where they were found.

An old train trestle re-imagined as an Egyptian obelisk.