The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.

An optical illusion found amid a logged redwood forest.

This massive redwood tree has a hole in the base big enough to drive through.

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

Rippling sand dunes frozen in the Arizona rock.

This massive geographical sculpture is so subtle, it's possible to pass by it without noticing.

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.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

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

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

The oldest lighthouse on America's west coast no longer needs keepers, yet they maintain the site anyhow.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

A strange house built only at night, with rumored mystic inspiration.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

An ancient iron pillar in Delhi that seems to be rustproof.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

15 monolithic temples emulate an eroding sand castle.

Eternal flame said to be a Hindu Goddesses fiery tounge.

Remote town home to Himachalis, Israelis, and tons of hashish.

A colossal floating restaurant built to look like a ancient Chinese imperial palace.

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

Climb to the top of the world's largest seated bronze Buddha.

Sculptures of religious figures made from the ashes of pilgrims' incense.