This poignant WWI memorial looks like a lighthouse 100 miles from the sea.

A collection of early 19th century trams set in a reconstructed period village.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

An open air haven for tropical monkeys in the damp moors of the English country.

This mysterious underground cave in Shropshire dates back to the 18th or 19th century.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

Built by the patron saint of illusionists this Elizabethan manor house is riddled with secret cubbies for hiding priests.

This historic abandoned train station looks like a stop for ghost trains.

This ingenious engineering solution was built to stop the "theft" of canal water.

This medieval manor house was equipped with secret compartments for hiding priests.

This pub can leave even the sober feeling slightly unsteady.