One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

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

The ruins of a Roman fort lie in the shadows of an imposing medieval castle.

A house of bones — but nobody is quite sure to whom they belong.

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

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

Also known as Rye Castle, this 13th-century fortification later became a prison and held one of Rye's most famous criminals.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

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

From battleships to Roman vessels, this museum explores the depths of shipwrecks in the region.

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

Discovered on a shipwreck after more than 400 years, this Renaissance ratter tells a very waggly tale.

Hauled from the water's depths, Henry VIII's flagship is preserved in this capsule-shaped museum.

This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

This cathedral's stained-glass patchwork of psychedelic colors and shapes was put in place long before the swinging 60s.

This star-shaped artillery fort protected the mouth of the Thames from the 16th century to the Second World War.

This foreboding medieval castle was twice besieged by barons rebelling against the English king.

The "Heroine of Dunkirk" rescued over 7,000 Allied troops during the historic World War II evacuation.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

This one-time health resort was used by aristocrats around the world.

The elegant structure of this 19th century railroad bridge creates an illusion of infinity.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

This medieval church is the only one in the world that features all Marc Chagall stained-glass windows.

Horsemen once used this tilting post during jousting practice.