The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

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

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

The return of something once considered a basic part of life.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

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

A beautiful geyser under environmental threat.

See massive fossils that are over 200 million years old in northeastern Arizona.

The world's longest known cave system.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

A waterfall runs right through the middle of this Taiwanese shrine to the hundreds of workers killed while building a nearby highway.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

Memorial to the father of the Republic of China.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Ancient serpentine sacrifice holder that has stood the test of time.

A fountain standing as a testament to a doomed alliance.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

1513 Turkish world map, full of European state secrets and snarky commentary.