This historical air terminal in Houston is slowly becoming an aviation museum dedicated to the city's aeronautical history.

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

A private collection of massive steel monsters guarding a Texas pipe works.

This seaworthy collection was sparked by one man's passion for sailing.

Civil War dumping ground for the bodies of terrorized Union sympathizers.

A health museum containing a 27’’½-foot intestine.

Scale replica of China's ancient terracotta tomb warriors and Forbidden City are the side project of an eccentric millionaire.

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

Continuing the tradition of the dime museum in style.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

A collection of 100 brains preserved in jars on the UT campus.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

Free public park and gardens filled with peacocks and peahens.

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

A Texas landowner spelled out his name with three miles of trees, a giant signature that's been used by NASA to evaluate satellite imagery.

Where hills of dirt conceal the burial ground of one of the most powerful ancient Native American societies.

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

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

Roadside attraction with more than 1,000 stuffed and mounted animal skins displayed in simulated natural habitats with hand-painted backdrops.

A 19th century family buried their dead among the pines, beneath gravestones styled after ancient Scottish cairns.

The world's tallest statue of an American hero.

$10,000 won in a poker game in 1884 allowed James Draughon to build this intriguing home.

The only international border marker within the United States.

This grimly-titled Texas cemetery is all that remains of a Wild West settlement with possibly the worst name.