This underwater old Texas hill town only resurfaces during harsh drought.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

Life-sized sculpture of a blue whale made of hand-recycled plastic trash.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

An abandoned vacation home spent a decade taking on legends. It's now taking on water.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.

One of the first historical sites of an alternative universe was installed in the town of Paris, Illinois—which is now home to an annual spelling bee of Kcymaerxthaereal words.

Burial mounds of prehistoric Native Americans who lived along the DuPage River.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

A 17th-century bezoar, dirt from an infamous site, and other curios decorate this unusual bar.

This ancient art form was used to capture the lives and struggles of the Haywood Street ministry.

An early life spent in this "Old Kentucky Home" inspired the writings of North Carolina's most famous novelist.

A museum dedicated to the legacy of Bob Moog and his pioneering synthesizers.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.

This bridge is haunted by the ghost of a distraught mother.

This national park dedicated to the tallgrass prairie ecosystem still displays its military past.

Dedicated to the history of the health sciences.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.