Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This “living museum” at UCLA exhibits thousands of plant species from all over the world.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

The state bird of New Mexico, constructed entirely out of garbage.

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

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world’s largest coastal brick fortresses.

This whimsical fountain pays tribute to Toronto's four-legged friends.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Olfactory delights in San Francisco's Botanical Gardens.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

Historic medieval fortified city in southwest France.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

Science fiction's grandfather has a fittingly marvelous tomb.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

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

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

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Paris' linguistic guide to the international language of, yes, love.

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