This downtown Dallas art installation is always on the lookout.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

This sacred cavern, 400 feet deep, is home to millions of bats and an ancient burial ground.

A grove of colossal man-made flowers built to collect the sun's rays.

This small town Texas cemetery is said to be the burial site of a UFO pilot who crashed in the 1800s.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

Free public park and gardens filled with peacocks and peahens.

A medieval castle in the middle of rural Texas.

The Grand Canyon of Texas.

A popular swimming hole that hides one of America's most deadly diving spots.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

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

A castle-inspired apartment building that has stood in Birmingham since 1927.

This small cemetery contains the graves of prisoners of war who were interred at Fort McClellan during World War II.

In 1863, a woman buried her hard-drinking husband beneath his beloved booze.

The remains of a foundry and old blast furnaces destroyed during the Civil War are preserved in this central Alabama park.

This 880-acre facility is home to a massive collection of vintage motorcycles and cars, as well as a 2.38-mile race course.

This fountain was commissioned by a mother grieving over her son's passing.

One of almost 200 confirmed impact craters in the entire world, untouched for tens of millions of years.

Since it formed millions of years ago, this cave system has been a sacred burial ground, a Prohibition-era speakeasy, and the center of an amusement park.

Monument to the cotton-destroying boll weevil.

The whimsical construction on the roof has given rise to many a Montgomery myth about its contents.