A tiny replica of the iconic London landmark hides on the side of the steel structure.

This Scottish castle has witnessed clan rivalries, Jacobite uprisings, whisky smuggling, and more.

Locals affectionately dubbed this World War I memorial "Tommy."

An unusual but excellent display created in the 1930s as propaganda against the Freemasons.

Flowers have mysteriously appeared on her effigy every day for the last 150 years.

The plunge pool is a surviving relic of a rowdy royal residence.

A little-known ruin with a convoluted history and a fascinating latrine drainage system.

This Gothic castle-like portal is a testament to the amazing craftsmanship of the navvies who built the railway tunnel.

A mysterious ruin shrouded in more folklore than fact.

This remote sandstone cliff has one of the richest collections of Livonian petroglyph marks.

The little-known second castle that William the Conqueror built in York.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

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

This charming candle shop has been in business since 1789.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

This amazing 15th-century mural remained hidden in plain sight for centuries.

An abandoned 17th-century baroque hunting lodge with a wonderfully strange architectural plan.

The mass grave of the 27 victims of the "Vampire of Hanover."

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

After years of slow decline, a derelict Gothic castle is now being restored to life.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

This cemetery features modernist statues as strange as its name.