Part of a secret 1970s nuclear defense program is now open to the public.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

Canada's subterranean Cold War museum has doubled as a movie set.

This museum sits on the site of a decommissioned military communications base.

This Cold War missile launch site has been abandoned for 40 years.

A lone historical marker off the highway and scattered debris are all that remain of this Cold War-era missile site.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

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

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

Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

These mansions date back to Chicago's days as a brewer's paradise.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

These abandoned grain silos and tunnels are an urban exploration dream.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

Largest magic museum in the United States with more than half a million pieces of memorabilia.

Everyone's invited to put on a miniature concert with this world-class musical wonder.

The unusual medical inventions of the man who gave the world Corn Flakes.