This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This elegant arc of a waterfall marks a religious turning point.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Tiki luxury on Nob Hill.

Fans of vintage Vegas, kitsch, and toy pony-based gambling now flock to a casino called The D.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

One of the oldest theaters in Australia, it's also said to be haunted by a performer who died on stage.

These mythological giants take time out of their busy day guarding a Victorian market to let you know what time it is.

A beautiful 1920s tower filled with local hidden gems.

Is there such thing as too many fruit bats? Not anymore.

You'll find the little birds tucked within the rocks of this Australian beach.

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

An opal mining town in the middle of Australia where people live, worship, and shop underground.

The longest fence in the world stretches over 3,000 miles to keep the dingoes out.

The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

The unusual patterns in this rock formation result from two distinct modes of weathering.

Oddly shaped rock formation, misassociated with a nearby utopian community.

It's safe—and permitted—to walk across these twin natural sandstone arches.

A small oasis not far from downtown Moab.