What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

These abandoned grain silos and tunnels are an urban exploration dream.

An antiquated German apothecary on Chicago's North Side.

A lush green oasis in the middle of Chicago.

A serene temple with stunning stained glass hides in downtown Dallas.

A hands-on traveling collection of the innovative devices of yesteryear.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

This beautiful fountain was sculpted by a female artist who was ahead of her time.

A historic observatory precariously perched at the "Top of Europe."

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Thirteen sculptures in central Moscow graphically depicting vices of the modern world.

This giant mural of Santa Muerte in downtown São Paulo reminds passersby of their own mortality.

The bookstore with bookshelves built into unlikely places.

This park feels like a lush little jungle full of wildlife nestled within São Paulo.

This singular art museum in São Paulo is unique inside and out.

Many cities have held the title, but Brazil snatched the crown from Chile in 2011.

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

A beautiful midcentury mural by the famed Brazilian modernist artist Emiliano Di Cavalcanti.

Dozens of vintage puppets are displayed in an unassuming hallway at the public library.

A jungle in the heart of São Paulo reminds visitors of what Brazil looked like untouched by man.

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