This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

The underground sanctuary of a mysterious ancient Roman religious cult contains an exquisite traditional fresco.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

This World War I fortress is the perfect place to catch a Montenegrin sunset.

Climb to the top of this windmill for a scenic panorama and up-close look at wind energy production.

A giant roundabout made up of six smaller roundabouts can befuddle the uninitiated.

Britain's tallest megalith towers over the cemetery of a quiet English village.

Wooden sleds have replaced donkeys to cart goods around this utterly charming car-free village.

This unassuming Victorian cemetery is the final resting place of author Lewis Carroll.

Manchester's abandoned train depot lingers in a post-industrial purgatory.

Every St. Andrews student knows to avoid this inscription for fear of a martyr's curse.

This ancient Egyptian obelisk still bears the wounds of World War I.

Constructed during the 7th century this is one of the oldest largely intact Christian churches in England.

These medieval monastery ruins are surprisingly overlooked by most tourists.

A striking 500-year-old mansion provides an unexpectedly sublime home for live deer and a menagerie of exotic stuffed animals.

A majestic mansion designed in Mughalai style, complete with a turquoise onion dome.

The first archaeological site discovered by aerial photography.

This witch statue remembers a time in England's history when fear trumped truth.

Seat of the Duke and Duchess of Devonshire for centuries.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

Man-made cave with enigmatic carvings, some say made by the Knights Templar themselves.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

This secluded walkway overlooks a magnificently wild London green space.