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

Some islands... they come, they go, especially on Lake Travis.

Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

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

Remembering the Alamo with a full-scale replica of the 1836 city.

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

The highest point in Texas is capped by a big silver pyramid.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A giant "X" symbolizes the blood spilled from the brutal Juárez drug wars.

See massive fossils that are over 200 million years old in northeastern Arizona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

Decommissioned experimental solar facilities that pioneered solar energy technology.

This strangely vacant Western amusement seems to be an empty tribute to residents of Lucerne Valley.

Thousands of turbines whir at the origin of North American wind power.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

Mexican food and folk art.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.