Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

At the western edge of Palm Springs, a rugged desert canyon trail leads to a waterfall at the base of the San Jacinto Mountains.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.

A proto micro-nation sometimes populated by artists, surrounded on all sides by a Utah most barren.

Stockholm's narrowest alley is barely over two feet wide.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

A historical puzzle lies at the origins of this structure.

This remote research station sits amid the second-largest ice sheet on the planet.