A total of 999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

A bright turquoise river cascades beautifully down stepped terraces in southern China.

270 million year-old forest of stone.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

A fifth-century temple improbably built into the side of a cliff.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

Most-visited and most-photographed slot canyon in the American Southwest.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Despite its name, this route in southern Utah offers a heavenly day trip.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Rippling sand dunes frozen in the Arizona rock.

This quiet park's strange sedimentary spires were named after Kodak's color film.

Local lore holds that Butch Cassidy took an escape route through Red Canyon's sandstone hoodoos after an attempted murder.

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

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.

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.

A serene temple with stunning stained glass hides in downtown Dallas.