This legendary urban waterfall creates a dazzling display of rainbows.

This black shoreline is made up of exploded lava particles.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

A wall of chewing gum moonlights as collective art.

Possibly the world's largest coin stands just outside of a Canadian science center.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Museum dedicated to awful artwork.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

A hidden "place of interment for gentlemen."

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

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

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

The celebrated eyesore created by starry-eyed sweethearts.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

P-town goes wild for the malassadas at this 87-year-old institution.

This vast collection of smoking pipes from across the world spans centuries.

Cat art as far as the eye can see.

Museum preserving torture methods from the past.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.