Europe's official "zero-level," the equator of elevation.

A blast from the past in central San Diego.

This historic graveyard was partially paved over to create a streetcar line.

San Diego's most historic and haunted home.

One of the most colorful free outdoor attractions in San Diego, this park is filled with murals and ties to history.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

At this local mall, visitors are ushered through a 1940s jail exhibit.

The world’s oldest active sailing ship.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

A hidden courtyard houses early 20th-century plaster masterpieces.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

Marta Becket's hand-painted theater in the desert.

This enormous fiberglass cow near Death Valley National Park once graced a casino roof in Las Vegas.

A cosmic pit stop just beyond the notorious Area 51.

"Only the devil could play golf here."

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Home of the only civilian casualty at the Battle of Gettysburg.

Experience the pivotal Civil War battle at this interactive museum.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.