Places jeffprahl Wants to Go

This 1920s Dutch barge is now a floating bookstore.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

Have a steam and some blini at this cafe in a century-old bathhouse.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

A Japanese pilot crash-landed on this Hawaiian island after the Pearl Harbor attack and terrorized locals for a week.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

Abandoned 37.5' diameter rusted metal sphere sitting in the woods.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

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

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

This Las Vegas casino boasts one of only three spiral escalators in the United States—an engineering wonder.

A luxurious doomsday bunker hidden beneath an unassuming Las Vegas home offers the best of subterranean suburbia.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

A new kind of theme park for adults off the Las Vegas Strip.