An old railroad grade built for the construction of Hoover Dam is now a recreational trail featuring several tunnels and sweeping views of Lake Mead.

Quite simply the largest tree in the world (by volume).

The second-largest giant sequoia in the world.

The drama of nature in full effect in this Nevada State Park.

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

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Improbably, the largest wildlife refuge in the conterminous 48 states sits just northwest of Las Vegas, Nevada.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

Water of undetermined depth has attracted rare fish and cult leaders alike.

The longest living non-clonal organisms on Earth.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

Go surfing on this urban wave, "hacked" by local surfers.

A hugely vast Irish landscape of barren rock that stretches for miles.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

This cheese shop also houses a museum devoted to Dutch dairy.

Cat art as far as the eye can see.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.