A mysterious castle built as a monument to lost love.

Former villa and estate of James Deering developed to preserve native tropical forests.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

A small World War II museum housed in what was once the largest navigation school in the United States.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

This mountaintop refuge rehabilitates tigers, lions, bears, and more from illicit wildlife trade—and offers overnight lodging.

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

Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.

One of the best-preserved Native American mounds remaining in the southern United States.

This impressive ledge seems to float above the Upper Buffalo Wilderness.

The only diamond mine in the world where you can keep what you find.

Memorials are nearly all that remains of this Arkansas prison camp, where thousands of Japanese Americans were forcibly relocated during World War II.

Mobsters came for a soak in the hot springs, and stayed for the illegal gambling and bootlegging.

Two gushing waterfalls of hot spring water within a block of each other.

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

People of the Plum Bayou culture built these enormous mounds over 1,000 years ago.

Elvis's own personal tropical hideaway.

A restored, one-room African-American schoolhouse in the diva's hometown now preserves the legacy of its most famous student.

Over a dozen Native American earth mounds dating back over 2,000 years dot this Tennessee archaeological park.

This defunct, fortress-like prison has been the setting for several movies.

This church houses the “incorrupt” body of its founding Bishop.

The world's longest known cave system.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.