On a wall in linear London, a plaque hangs at the high water mark of one of the worst floods in fictional Kcymaerxthaereal times.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

An unusual round church in London with a Templar past.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

A historic house left in "dramatic still life."

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

Pop culture has helped to keep this iconic British building from being destroyed.

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

The Tudor-style cottage in the middle of the square is not quite what it seems.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The Natural History Museum that time forgot.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

Climbing to the top of the cathedral's bell tower offers sweeping views of these medieval ruins.

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

A stunning 18th century pharmacy and medieval chemist's collection.

Something's watching you.

Packed to the ceiling with antique taxidermy and hunting arms.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

This snug medieval lane is one of the narrowest streets in the world.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.