While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The largest cemetery in the American Southeast is a hidden gem near the heart of Atlanta.

Atlanta's strange assortment of concrete pillars inspires reflection in some, confusion in others.

One of the world’s largest collections of paper memorabilia chronicles 4,000 years of papermaking.

A psychedelic tribute to one of Georgia's most unique artistic visionaries, out of place and time in the heart of Atlanta.

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.

Healing Springs that once ran red with soldiers' blood.

An underground magnet for ever-changing street art.

Scattered around Atlanta are little doors with big charm.

The busy transport hub is home to the tallest airport slide in the world.

The highest pedestrian bridge in Singapore looks like a series of undulating waves rising between two public parks.

A disused quarry turned lake in the middle of a residential district.

Singapore's last surviving traditional village is hidden among giant skyscrapers and modern infrastructure.

A slanted tomb honors the faithful, furry companion of the Georgia Tech student body.

This angular brutalist playground turns playtime into modern art time.

A colorful square marks the heart of the city's LGBTQ community.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

From prostitutes to soldiers to business men, the dead in this graveyard are a microcosm of Singapore's history with Japan.

One of the first big sculptures anywhere in Australia.

Rows of stone statues are dressed up to mourn children that are lost before birth.

Peace Park and the Atomic Bomb Dome.

Once a black market electronics marketplace, now an otaku shopper's paradise.