One of the most important yet well-hidden museums dedicated to the history of medicine.

One of seven Jewish catacombs in Rome and one of only two open to the public.

This Parisian café sticks almost exclusively to an ethos of reuse.

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

The history of radiation is on safe display at the foot of a radiation science laboratory.

This museum houses an imposing skeleton army comprised of creatures great and small.

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

A Roman spa buried deep beneath the City of London.

This museum tucked below a charming cafe gives a brief snapshot of photographic history.

Collection dedicated to brands, packaging and advertising.

The collection contains over 25,000 items and details the painful dental practices of the past.

This historic building displays the remains of a victim of the devastating 14th-century plague.

A domino effect created with Britain’s iconic telephone boxes.

One of the world's largest collections of pathological specimens.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

A cluttered and astounding collection of antiquities and curiosities.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

The largest greenhouse in the world is home to over one million types of plants.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

The longest hedge maze in the world.