Enormous burial mounds of ancient emperors.

One of the world's longest murals depicts the history of diversity in Los Angeles.

The most famous location in China was home to whole dynasties worth of imperial rulers.

A giant scale model giving a sneak peek at what urban planners see for Shanghai by 2020.

The once highest point in China blends symbolic design with a kick of adrenaline.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

A super-sized promotional trick that is now a D.C. landmark.

This psychedelic tourist trap is a leisurely descent into madness.

At 207 feet, one of the world's longest continuous escalators.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

The site of the climactic scene from the classic horror film is now a historic landmark.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

The "lovely red Vega" of the legendary record-settling pilot.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Largest collection of mounted dinosaur specimens in the world.

In the heart of Brigham Young's promised land sits a festering plot of industrial ruin that has been claimed by society's outcasts.

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

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

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

Rippling sand dunes frozen in the Arizona rock.

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.

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