The first American department store, and home to the largest operating musical instrument in the world.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

This elaborate towering structure was once famed for its revolutionary height.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Dr Barnes' $25 billion private collection of art and arboretum.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

The world’s first penitentiary, meant to be humane, drove men insane.

Step inside Lucy, the world's largest "elephant."

Kentucky's anomalous peninsula projecting into the Mississippi River, site of legendary earthquakes and local feuds.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This single room has survived the centuries with almost no deterioration.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

Experience a charming 1930s version of "infotainment."

The drama of nature in full effect in this Nevada State Park.

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

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

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

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

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

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Legends surround this jagged rock formation in the New Mexico desert.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.