This oasis-like spring in the Sonoran Desert is home to unique, endangered species.

Some 2,000 carvings show this rare desert spring has been an oasis for travelers for over a thousand years.

This bird-shaped rock formation defies gravity, time, and classification.

This church on a Tohono O'Odham reservation has stood since 1797.

Run by members of the Tohono O'odham Nation, this community farm nurtures traditional desert cultivars.

Make a wish at what might be America's only Catholic shrine to a sinner.

The remains of this rugged homestead ranch offer a brief glimpse into a bygone era.

A reproduction of earth's many biomes.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

This café is dedicated to serving coffee roasted by Native American-owned companies.

An encyclopedic collection of mammal penises.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The most powerful waterfall in all of Europe.

Staves, storm-calling, and of course, necropants.

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

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

A little-visited waterfall in an otherworldly landscape.

Rising from the sea like a stone monster.

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