One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The site of the house Jack Parsons made famous both in life and death.

A rare surviving example of a pre-WWII Japanese garden, restored after years of neglect.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

A starship has landed in Texas, a welcome break for weary travelers from a drab stretch of I-35.

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

A Bhutanese temple gifted from the isolated Himalayan kingdom is now a surprising cultural gem located at the University of Texas at El Paso.

The upstairs reading room is packed with millions of rare books, literary manuscripts, and historical treasures.

An unrealized Taoist palace left abandoned in a Houston suburb.

A collection of massive stacked rocks in Texas includes a snarky note on the benefits of modern technology.

A medieval castle in the middle of rural Texas.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

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

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.

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

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

The Grand Canyon of Texas.

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

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

Built following the War of 1812, this fort has withstood hurricanes for centuries.

Giant novelty guitars now mark the spot where Robert Johnson is said to have sold his soul to the devil.