Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

The first declared National Monument in the United States.

An antique Beechcraft airplane serves as a giant windsock for people driving through the blustery open country of eastern Wyoming.

A cemetery housing wild west legends in South Dakota.

This geodesic gallery holds a collection of painted spheres that make traditional canvases look lazy by comparison.

The massive steel ring looks like it could be China’s first Stargate.

Buried for centuries, this hidden cellar is all that remains of London's medieval Whitefriars Monastery.

In the fictional world of Kcymaerxthaere, this was the former home of the Marshal of Gravity and the site of his tragic death.

An emerald-green grotto just a short trip from Austin.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

One part antique store, one part curiosities hodge-podge.

This eclectic, mosaic-clad home includes a bamboo ping-pong loft and a "Whispermaphones" intercom.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A tribute to the "toughest woman on the Texas frontier," who survived a famous battle and five husbands.

An exquisite grouping of structures made from 10 tons of invasive saplings.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Continuing the tradition of the dime museum in style.

A view-altering observatory at the University of Texas.

A former electrical substation is now home to an eccentric junk art masterpiece.

DIY collection of eclectic holdings.

A medieval castle in the middle of rural Texas.