Geology

A spiral staircase connects the limestone cave with Pembroke Castle, birthplace of King Henry VII.

The jaw of one of humankind's earliest ancestors on display at an overlooked geology museum.

A tiny chapel clings to a precipice above Germany’s gemstone capital.

A collection of heirloom roses tucked in a spectacularly beautiful botanical garden on Lake Atitlan.

An impressive century-old, to-scale topographical map of Guatemala.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

A mysterious crater-like pond has a spooky tendency to empty and fill with complete disregard to rainfall patterns.

A boat ride through utter darkness, lit only by headlamps, reveals an emerald green pool locals believe is sacred.

The outcropping is graffitied with the name of the beloved musical Muppet television series.

The cardinal directions, set in stone.

This rare basalt crater lake is used to study the Moon and Mars.

Rich red almandine gemstones are waiting inside the volcanic rock strewn across this eastern Nevada hillside.

The English town of Mansfield likely got its name from this enigmatic breast-shaped mound rising abruptly from the earth.