A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

A curious cone-shaped structure made of wire and covered with antlers.

This quirky outpost and gallery inside a former church is an unexpected trove of handcrafted art.

This unassuming North Austin neighborhood was built to test the novel idea of home air conditioning.

Light still pours into the ruins of this ancient Islamic observatory.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

The Avenue of Mausolea is a series of grand palatial tombs.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

These "50 Fortresses" have been unearthed in the ancient oasis of Khwarezm.

Ancient barriers wrap around what was once an important stop along the Silk Road.

Extremely isolated Silk Road caravanserai in the middle of nowhere.

Final palace complex of the last of 29 Kokand rulers.

Touching displays of wishes for peace from the Cold War era.

More than 10,000 small mirrors cover the curved surface of the world's second-largest solar oven, located in a remote village in Uzbekistan.

The heartbeat of modern Uzbekistan’s thriving market culture.

The largest Lenin statue in Central Asia was moved to an empty field rather than being destroyed.

Nikola Tesla's former home contains an homage hidden from plain sight.

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

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

A mysterious "wedding cake" castle in the middle of the urban desert.

The unusual burial monument of Arizona's first governor.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

Eons ago, a rushing lava river formed this pristine passage through solid rock.