This hidden alley near the location of Rome's first theater was the site of a curious miracle.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

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

A 15th-century monumental Latin inscription on this house celebrates Lorenzo Manilio's love for Rome.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

An alchemist's “magic door” stands in the middle of a Roman park.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

A sculpture serving as an homage to Pope John Paul II.

An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Preserved behind glass, the ruins of a medieval building used to store human remains.

This pub boasts a curious history and may have inspired a Dickens character.

This 19th-century Turkish bath house survived the Blitz of London and is now an events venue.

Ship-sized kinetic sculptural fantasy.

Before becoming a poet John Keats studied here to become a surgeon.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

This third-generation institution is one of the last in London that still cures its own salt beef for epic sandwiches.

Soon after its unveiling, this giant inverted globe sparked controversy and was vandalized.

This inn of the court provides a fascinating window into London’s legal and architectural history.

A cluttered and astounding collection of antiquities and curiosities.