The largest self-built castle in the U.S., six decades in the making.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

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

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

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

Yo, Adrian!

A layered tribute to the work of mosaicist Isaiah Zagar.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

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.

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

An unfinished rail tunnel that has since been used to house cheese and bats.

This 1,500-acre development hopes to be the Central Park of the South.

The ruins of a paper mill destroyed during the Civil War still tower over a tributary of the Chattahoochee River.

The record holder for the world’s largest peach.

This granite rock face is named for the magnificent reflection that occurs when the sun hits it just right.

An eerie site of reverence for those who have completed an epic journey.

This old school, eccentric, and independent video rental store refuses to die.

An old bank vault in Atlanta is now the eternal shrine to the King of Rock and Roll.

One of the few surviving "Wigwam"-themed motels.

Prehistoric animals decorate this popular outdoor park.

The world's longest known cave system.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.