World's largest magnetic research facility.

Ruins of a Carnegie family mansion on Cumberland Island.

This picturesque ghost town is located on the banks of the Suwannee River.

History is hiding at the Morean Center for Clay.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

A Florida college boasts the world's largest single-site collection of structures designed by Frank Lloyd Wright.

This facility, now a museum, once housed and trained U.S. Army Air Force pilots who flew during the Allied invasion of Normandy.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Loyal fans of one television's most famous painters still come to pay their respects.

The only remaining Cold War–era Minuteman II missile control center in Missouri.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

Step back in time at this 1950s display home, built to showcase once cutting-edge electric amenities.

Undone by Prohibition, this abandoned brewery-turned-flour mill is now ready for its third act.

An opulent testament to the boom-and-bust history of industry in north central Indiana.

A remarkably opulent mansion with a tragic history.

A sprawling outdoor museum filled with larger-than-life works of art.

The final resting place of the world's first nuclear reactor.

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

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

Meant for a railway that was never built because of the Great Chicago Fire, these piers still stand nearly 150 years after they were installed.

This historic Illinois "Muffler Man" has been converted from axe-touting lumberjack to rocket-wielding space ace.

Man-made geyser that rises to the exact height of the Gateway Arch.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.