A wall of chewing gum moonlights as collective art.

Cliffs full of fossils at the portal to England's Jurassic Coast.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

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

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

Also known as the Cathedral of the Plains, this church holds the distinction of being one of the "8 Wonders of Kansas."

Salina's eye-catching giant mural depicting children at play is painted atop a century-old mill elevator.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

This mural honoring a drowned village has become a symbol of Welsh pride and patriotism.

A real-life Professor Snape once taught in this Welsh university building, which students of course nicknamed “Hogwarts.”

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

All that remains of the medieval palace of the famous "Black Prince."

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

One man's psychedelic fence is painted with his cacophonous folk art musings on the world.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

These whimsical works of art tell the story of the city's past and present.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

This landmark cemetery in Boston was created more than 300 years ago.