Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

This turn of the century masterpiece has a mysterious goaty interloper.

An overlooked and unassuming engineering marvel.

A living time capsule of the 1960s Richardson Bay water-front.

Concrete strongholds stand guard over the Golden Gate.

Ride on a fully-restored Nike nuclear-tipped missile elevator from the Cold War.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

The most beautiful Taco Bell in the world even has surfboard parking.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

A mysterious spirit totem at the edge of Navajo lands.

This historic national park is covered in the stunning ruins of red rock pueblos.

Ancient pueblos built into the base of a natural canyon wall.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

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 tunnel with windows, so you don't miss out on the impressive views.

The unusual patterns in this rock formation result from two distinct modes of weathering.

Nature has shaped this drainage tunnel into the digestive tract of a mighty beast.

Not your typical pet cemetery.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

Colorful sand dunes create a unique attraction in this part of Utah's red-rock country.

A series of tiny artificial islands rich with produce bob atop the surface of the lake.