Inside this Krakow church, an explosion of psychedelic color.

Atop this library is one of the most beautiful green spaces in Warsaw.

A double cantilever system bridge that was designed to prevent flood damage.

A quartet of brightly colored mythical beasts stand sentry at this gateway.

The remnants of a facade from a 19th-century market stall emporium.

The location of a citizen uprising that led to a gruesome act of mob justice.

A rare and unique example of an 18th-century door latch calls this restaurant home.

Scotland's first Masonic lodge may also be the oldest in the world.

This 15th-century structure had a long, tortuous journey to its current location.

A miniature of a lighthouse acts as a beacon for what transpires inside this location.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

A roadway designed for a visiting monarch.

Now home to a drinking establishment, this building has a macabre history.

This grave marks one of few bodies retrieved from the disastrous Franklin Arctic expedition.

This monument is dedicated to a young boy who survived a disaster that forced Edinburgh to reevaluate its building codes.

The building where Mary, Queen of Scots was said to have bathed in white wine.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

A British plaque explains that a house was built using the spoils of the first international golf bet.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

This charming old building's loose connection with the Scottish Reformer is what saved it from demolition after it split apart.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

This Scottish graveyard is the final resting place of the man who inspired the character Ebenezer Scrooge.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.