The 7,000-year-old calcium carbonate formation creates a magnificent natural bridge.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

Home of the International Space Hall of Fame.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

On the edge of the Valles Caldera National Preserve, these rock formations create an eerie landscape.

This outdoor observatory offers stellar views and a scale model of our solar system.

These headstones and a few stone foundations are all that remain of a once-booming mining town.

The abstract sandstone rock formations at this Algerian national park are rich with prehistoric art.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

This ancient Irish landscape boasts hundreds of legendary ruins.

An outstanding and haunting glimpse of the horrors of the Great Famine of Ireland.

A steam trawler with a whiskey-soaked history driven ashore in 1960 resides rusty but still standing on the shoreline.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

Petrified footprints of one of the very first vertebrates to walk on land.

The world's tallest box hedge is found in a delightful garden.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

Along a California highway is a kind of Jurassic Park made of metal.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

Although he donated over 3,000 acres to Los Angles, Griffith's life was marred by controversy.

An Italian restaurant became a rock-and-roll hangout and the lair of the "Hollywood vampires."