A grove of colossal man-made flowers built to collect the sun's rays.

One part antique store, one part curiosities hodge-podge.

A Cold War command center is hidden under an idyllic countryside.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

The former home of a trailblazing surrealist is still filled with haunting dolls and grim paintings.

Museum in a swimming pool where the water still flows.

Folklore and history carved into Brittany's coast.

Figures of unknown origin carved into the surfaces of underground caves.

Beautiful carved tunnels.

A self-built mosaic house and sculpture park.

An ancient ossuary in Rouen.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

Once a train station along the Great Eastern Railway this vibrant coffee shop and bar is where members of London’s creative class mingle.

A five-story homage to tea times past.

Artists and musicians now rule over this former rail station.

Residential building on the Regents Canal is a breeding ground for creativity and innovation.

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

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.