This simple roadside art installation ended up sparking a folk art movement and a controversy of international proportions.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Half curiosity cabinet, half late night hotspot, this Brazilian bar is helping turn a dangerous neighborhood around.

Legends surround an ancient tree trunk riddled with nails for good luck.

Try not to get lost in this picturesque Brazilian labyrinth of the dead.

One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

An art museum with an eclectic design and a scandalous past.

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

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

A 125-meter long "tribute to the Brazilian people."

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

An abandoned stretch of elevated road in the middle of the Brazilian jungle.

The ruins of this Brazilian island prison still bear the scars of the bloody rebellion that closed it down.

The bookstore with bookshelves built into unlikely places.

A snake farm famous for its venemous varieties.

Hear the quietest sound from across the dome.

The world's first and only escalator for lazy bicycles and their daunted riders.

This empty Detroit high school was too expensive to maintain or destroy.

For a couple of months each year this Swedish city turns into a festive neon phantasmagoria.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Annual technopop celebration of peace and love.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

The world's biggest floating museum in Gothenburg, Sweden.