The prototype for all Nazi concentration camps.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

A plain wooden seat that once belonged to one of the most prominent figures of the Protestant Reformation.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Where commuters walk through remnants of an ancient Greek necropolis.

The ruins of this ancient fortification wall sit in the middle of a quiet, residential intersection.

A Byzantine-era church hidden in a wooded area below the Acropolis.

This architecturally eclectic early-20th century mosque was built as a place of worship for the Islamic followers of a Jewish messiah.

One of the most photographed locations in the entire city.

One of the ghostly stops along Route 66.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

In 1967, murder and mayhem disrupted the tranquility along this quiet stretch of Old Route 66.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Where the polar bear watches over everything, and every drink is a double.

A dentist's hated concrete colossi are now beloved icons of the community.

The tallest bridge in California was constructed for a project that was eventually cancelled.

Come crisp December nights, this fairly plain neighborhood becomes a holiday dream world.

Though tiki culture has gone in and out of fashion, the Tonga Hut has always been flying the flag in Los Angeles.

This iconic neon jester is a local landmark that you might recognize from his cameos in film and television.

The programmatic glory of LA's giant whiskey barrel building has become an upscale reminder of the city's kitschy roadside past.

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

A second generation sun-powered marvel lights up the night.

One of the most colorful free outdoor attractions in San Diego, this park is filled with murals and ties to history.