In Rickwood Caverns, visitors can travel hundreds of feet underground and see beautiful formations unique to the region.

A little-known occurrence of fossil wood in northern Washoe County, Nevada, near the Black Rock Desert.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

One of the best-preserved Native American mounds remaining in the southern United States.

An abandoned fish-shaped drive-in gets a second life as a restaurant.

At this gas station in the middle of the desert, a convenience store has been carved directly into the rock.

See Hoover Dam and the bypass bridge from a perspective usually off-limits to the public, and float the upper part of the Black Canyon National Water Trail.

Now in disrepair, this 19th century station was a stop on of the famed B&O Railroad.

This Indiana walk of fame honors music legends with record-shaped plaques in the pavement.

An art deco ice cream shop covered in vintage train station tiles.

An ill-fated attempt to grow wheat in the sagebrush steppe of northeastern Nevada.

This former shopping outlet is now adorned with beautiful graffiti and murals.

Thousands of glyphs created by an unknown culture decorate the rock formations of this canyon.

Only intact Ichthyosaur skeleton in the United States.

The buildings are among the few Frank Lloyd Wright structures still standing in Japan.

Not one, but two of Frank Lloyd Wright's architectural masterpieces nestled on the same street.

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

Frank Lloyd Wright died a year before construction on his largest public project even began.

One of only two pod-shaped homes designed by Frank Lloyd Wright.

The only house in Oregon designed by the famous architect, Frank Lloyd Wright.

A Florida college boasts the world's largest single-site collection of structures designed by Frank Lloyd Wright.

One of Frank Lloyd Wright's final works was this UFO church.

Early prototype for Frank Lloyd Wright's Guggenheim.

The famed architect designed this Minnesota gas station of the future with a lookout tower.