Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

A surrealist timepiece by the artist of melting clocks.

A mechanized clock where a man fights off a dragon, crab, and rooster.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

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

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

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

The oldest stone house in Paris was built by its most famous alchemist.

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

Notorious artist squat renovated into legal studios.

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

Bouncing, delightful, mechanical art at the MIT Museum.

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

The world's largest piece of copyrighted artwork.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

Radical Bookstore and Community Space.

This Brazilian Lady Liberty is one of the few replicas that was actually made by the original designer.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

This stunning Brazilian library contains the largest collection of Portuguese texts outside of Portugal itself.

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.

Beautiful public park off the beaten path and away from tourists.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.