This otherworldly church spire reaches up toward the heavens.

A remarkably opulent mansion with a tragic history.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

This art deco masterpiece was once a miracle spring mecca but is now simply a government office building.

Amazingly detailed marble cinerary urns that once held the cremains of Roman elite.

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

For over 75 years, this cute stone statue has warmed the hearts of San Antonio.

The only museum dedicated to the history of the "Magic Lantern," a medieval slide projector.

This tiny, hurricane-resistant house in Galveston is one of the city's most notable architectural oddities.

An amazing stag sculpture constructed entirely of discarded materials.

This unique tower has been home to malaria-fighting bats for 100 years.

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

Giant heads occasionally litter the industrial Houston neighborhood where sculptor David Adickes has his studio.

Campus tradition says couples who walk beneath this enormous oak will stay together forever.

Decades of discarded bottle caps line this alleyway, a fixture of Texas A&M.

This family cemetery is a reminder of a smallpox outbreak in late-19th-century Texas.

This abandoned building made of petrified wood was once a hotspot for buying moonshine.

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

This Art Deco airport was once deemed “the air hub of the Americas.”

A mysterious find dredged from Louisiana waters.

A 19th-century Gothic, castle-like statehouse by the Mississippi River.

The crumbling ruins of this southern American fort have survived storms, war, and cults.

The state's oldest continuously operating museum houses more than 5,000 Civil War artifacts.

This abandoned Civil War fortress is slowly being swallowed by the waters of Lake Borgne.