Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

One of the longest water bridges in the world was built over a supposedly haunted swamp in Louisiana.

Elvis's own personal tropical hideaway.

This iron and wood Civil War city-ship was the first vessel to be sunk by an electrically detonated torpedo.

What else would you call a playground hidden in Alabama's oldest and largest cemetery?

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

This quirky Arkansas wax museum does not shy away from the macabre and the grotesque.

This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

This Little Rock legend has survived decades of rowdy crowds, three fires, and a zombie wedding.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

A mythical chimera first sculpted in 1936 as a mix of the main animals of Texas livestock.

The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

An ancient Egyptian temple in the middle of Madrid, Spain.

Spain's stunning solar energy plant.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

One part local history, 99 parts gruesome haunted house.

This Balinese sea temple is thought to be guarded by the hundreds of monkeys that live around it.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

Hindu temple of the dead home to hundreds of long-tailed macaques.