A museum dedicated to the alleged Roswell Incident.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Built by a king and rebuilt by an emperor, this aqueduct transported water for 1,200 years to this ancient Mediterranean hub.

This 1930s log cabin began as a taxidermy museum but is now a popular country music venue.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

A late-night restaurant empire was launched from this humble storefront.

These three lighthouses played a fundamental role in the maritime life of Eastham.

This downtown Dallas art installation is always on the lookout.

A "Texanic" (gigantic Texas) collection of Art Deco architecture at Dallas' historic Fair Park.

A modernist landscape of water and sci-fi concrete.

An unusual art exhibition in a suburban yard is designed to awaken the souls of those flowing by.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

This abandoned nuclear cooling tower casts a shadow over a bucolic town.

This ancient market is often referred to as the oldest shopping mall in the world.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

The island home of an unlucky whaling captain whose story inspired a great American novel.

This sculpture combines the literary Alice with her real-life inspiration.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

The original place where water met land in the City by the Bay is outlined in brass.

The Lowcountry color with the power to stop evil from entering a home.

A serene plaza that commemorates one of the Granite State's most iconic figures.

The ritual has been performed uninterrupted for nearly 700 years.

The poems Nathaniel Hawthorne and his wife Sophia etched into its windows are still visible today.