Some of the tallest ancient American ruins continue to inspire awe and curiosity.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

America's only nuclear missile silo open to the public.

This church on a Tohono O'Odham reservation has stood since 1797.

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

The oldest monument in Marrakesh and the city's only surviving example of Almoravid architecture.

Despite the name, this 16th-century structure in Galway wasn't built by the Spanish.

Originally built to monitor fishing, this Victorian tower now educates visitors about the local salmon industry.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

A hugely vast Irish landscape of barren rock that stretches for miles.

This natural sea arch highlights Ireland's rugged coastal beauty.

A small memorial commemorates a man who died at Kilkee Cliffs.

After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

The house where the writer spent his formative years.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.