The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Copenhagen's celebrated theme park and gardens.

A 200-year-old prison that now houses a peculiar crime museum.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

This demon atop the Notre-Dame de Paris looks utterly bored.

During the summer months, giant teddy bears take over Paris near Les Gobelins metro station.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This bronze statue stands throughout the year and illustrates an urgent message about the environment.

An authentic, seaworthy replica of the ship that sailed to Newfoundland in 1497.

It houses a menagerie of wondrous taxidermy specimens from around the world, including the remains of a famous gorilla.

The world's shortest funicular ferries beachgoers a whopping 128 feet from clifftop to shore.

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

This city square dates back to the Scottish Enlightenment and was home to some of Scotland's brightest minds.

A roadway designed for a visiting monarch.

This tiny weathered plot is one of the oldest Jewish cemeteries in Scotland.

An artist's whimsical transformation of everyday objects.

Anonymously sculpted and donated, these sculptures made from poetry books and pages are sprinkled around the city.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

This small museum in a 17th-century building honors three iconic Scottish writers.

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

The remains of an ancient bathhouse sit inside this aptly-named pub.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.