A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

This small exhibit explores the lives of Chang and Eng, the first known conjoined twins.

Andy Griffith's hometown has made itself up to look like the fictional town of Mayberry.

This North Carolina grave is the final resting place of the world's most famous conjoined twins.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

A local landmark with generations of spraypainted messages, and more being added each day.

Florida’s half-sized replica of the Vietnam Veterans Wall.

A former hospital is now home to a pizza parlor and maybe a few ghosts.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

A historic and oft-filmed prison stands in a Chicago suburb.

This intricate Hindu temple is the largest of its kind outside of India itself and was constructed like a giant puzzle.

The secret city built by the Manhattan Project.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

The remains of a chapel created for convenience.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

The ruins of a once-thriving sugarcane plantation that was burned in the Second Seminole War.

A replica of one of the more than 15,000 civilian lookout towers that lined the U.S. coast during World War II.

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

A building so large that it has its own weather.

An 18th-century Spanish watchtower made entirely of seashell and concrete.