This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Go inside to really appreciate this 500-year-old technological masterpiece.

This device was crucial to the Industrial Revolution development of Leeds.

Winner of the Leeds Award for Architecture and the Environment.

This sculpture of Edward of Woodstock is surrounded by eight Victorian lamp bearers.

One of three sites in England that house the National Collection of Arms and Armour.

The bizarre headgear looks like it was made for a fool, not a king.

This tidal island, a sacred site in early English Christianity, was the target of a notable Viking invasion.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

A stone copper was sculpted on the wall of the Carlisle Cathedral to honor a local hero.

The first statue to be added to Saint Peter's Square in over 350 years is an ode to migrants and refugees around the world.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

Breathtaking and huge 430 year old maps of Italy.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Beneath the city of Lourdes, France is a massive, concrete church.

Site of the first radio and telephone broadcasting companies in Copenhagen.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

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

Copenhagen's celebrated theme park and gardens.