This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

Featured in one of the most iconic scenes in cinema history.

This roadside attraction looks like a flying saucer parked atop the tundra.

This lesser-known Frank Gehry building houses a treasure trove of cinema history.

It was once the longest continuously running cinema in the United Kingdom.

Time has been frozen at this station since the bombing in 1980—or so it was believed.

From Iggy Pop to David Bowie to Nick Cave, this regal music studio has served some of the all time greats.

This century-old cinema is complete with musical interludes and boasts a rare projection system.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

An underground network of massive stone arches and their skylit vaults support ruins of portico structures above.

These ruins once flourished as the capital of the Lydian kingdom, often credited with the invention of metal coinage.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

Mausoleum and Holy Seat of Antiochus I of Commagene.

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.

This Turkish cave boasts some rather bizarre associations with the King of Mount Olympus.

Ottoman-era houses lovingly preserved.

Turkish adventurer antiques in the heart of the Grand Bazaar.

The ornate miniature mansions were built for Istanbul's feathered residents.

Hidden just under the waters around this Turkish island are the ruins of a once great city.

This famous city eluded concrete detection until the early 2000's.

Roman ruins top white travertine terraces formed by ancient hot springs.