Climb inside an iron crystal magnified 165 billion times its normal size.

The last four extravagant street signs of London's historic banking street.

The world's largest grapevine has produced a delicious harvest at Hampton Court Palace for almost 250 years.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

Eighty million natural history specimens call this gargantuan museum home.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The celebrated eyesore created by starry-eyed sweethearts.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

This bridge was constructed from the rubble of the infamous Bastille.

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.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

An ancient Egyptian temple in the middle of Madrid, Spain.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.