"The only replacement for a DC-3 is another DC-3."

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

What's that on the side of that building? Va Va Voom, it's Bettie!

The first park built over a freeway is a brutalist masterwork.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

The world's largest grapevine has produced a delicious harvest at Hampton Court Palace for almost 250 years.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A statue high in a hill that represents how Buffalo Bill got his name.

A particularly disconcerting tribute to Irish martyrs.

The modern birthplace of Irish freedom.

After miraculously surviving a giant flood, the 19th-century nut tree and its offspring are protected with their own tiny park.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Hot Doug's "Hot Dog" Stand.

First known as the "Sample House," this construction mash-up was meant to be a living catalogue of building styles.

These mansions date back to Chicago's days as a brewer's paradise.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Moonbows over Kentucky.

The world's longest known cave system.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.