The site of the first battle of World War II.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

The secret medieval communication system will whisk your words above the noise of the crowd.

An unusual resting place built into the hill with an amazing view of Lake Como.

This half-finished "city of toys" was almost Italy's own Las Vegas.

An ancient artistic garden parlor full of hidden water wonders.

A dilapidated psychiatric facility on the outskirts of Milan where electroconvulsive therapy was developed and Napoleon once lived.

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.

England's most notorious suicide spot.

This remarkably intact, 260-year-old cargo ship is only visible at the lowest of spring tides.

During the heyday of fishing in Hastings, there were more than 100 of these storage facilities.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

This centuries-old hotel hides a network of secret cellars and passages once used by smugglers.

Its walls are adorned with exquisite murals of the natural world, transforming it into an ecologist’s Sistine Chapel.

Huge concrete structures designed as an early warning system for Britain to detect enemy aircraft.

A winding cave grotto walkway built to provide employment for veterans after World War I.