This community on a small Venetian island has taken to painting their houses in bright neon hues.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Museum preserving torture methods from the past.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Olfactory delights in San Francisco's Botanical Gardens.

The most visited, and possibly most controversial, museum in Germany.

A beautiful geyser under environmental threat.

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

One of the oldest medical collections in Europe focusing on rare surgical instruments.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Started as a kitchen garden, now the second largest botanical garden in the world.

A submerged archeological park still holds the wonders of a Roman Sodom.

Continuing the tradition of the dime museum in style.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Macabre astrological automaton clock dating to the late 1400s.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

An Australian lake whose pink hue defies scientific explanation.

Two stunning 17th-century libraries and a cabinet of curiosities.

This shop specializes in oddities and Victorian-inspired wonders.

This massive library holds what was once the largest book collection in the world.