On the side of Christchurch Mansion is an enigmatic block of dark limestone that dates back to 14th-century Belgium.

A rare medieval bone-house, surrounded by remarkable memorial stones

The grand 14th-century gateway to the lost abbey of St Edmund

Step back in time at this 19th-century kiosk.

A remarkable medieval structure born from a 14th-century disaster.

A unique clock tower in the garden of an elegant Victorian hall.

Ruins of a church in a peaceful location overlooking fields.

A Roman amphitheatre turned meeting spot for witches.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

A 4,000-year-old burial site hides behind a roadside Burger King.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Plaques on its facade commemorate the Tiber's most destructive deluges.

A small cell adjacent to this church was once the bedroom for a renowned saint.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

This striking steel sculpture transforms environmental data into art.

An unlikely connection between a little English town and the most famous brand of American motorcycles.

The forest hides a cemetery where members of the British Legion rest in peace.

One of several Lilliputian portals that are ready to transport passengers to other dimensions, if they can find them.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

A treasure trove of astronomical, mathematical, and scientific instruments at Cambridge University.

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.