The only arched bridge made of stone on the entire Mississippi River.

When flour explodes, it's not a pretty sight.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

A whimsical sensor instrument for Minneapolitans to play on their walks to work.

20,000 pieces in a Frank Gehry-designed building.

Funhouse of found art and participatory sculpture.

Pablo Neruda's custom-built lover's nest was made to remind him of the sea and named after his mistress' hair.

It's just another skyscraper, but it's shaped like '90s cell phone.

This historic Chilean cemetery is the burial place of hundreds of European and American freethinkers and non-Catholics.

Pivotal home of Nobel Prize winner Pablo Neruda.

What was once a unique system of urban elevators is turning into a mechanical ruin.

The pedestrian traffic signals in Brazil's teeming metropolis light up with clues to nearby landmarks.

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

A huge boat-shaped hotel with a blood red pool and other oddities.

The crypts are so large they're basically their own underground church.

The bookstore with bookshelves built into unlikely places.

Wedged between two sets of row houses is an awkwardly located family graveyard.

A museum dedicated to exhibiting remarkable outsider art.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

Hear the quietest sound from across the dome.

The curios of pharmacist and collector Henry Wellcome.

Banksy gives themself artistic license with this piece of London street art.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).