A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

Cemetery featuring rare glass-fronted columbarium.

When the town wouldn't allow the fast-food behemoth to build a new restaurant, they put one inside an 1850 home.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A psychedelic labyrinth on the San Francisco bay.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

The bulletproof cross stands at the only operational Christian cemetery in Pakistan's most populated city.

This commanding mausoleum holds the remains of Muhammad Ali Jinnah, the founder of Pakistan.

Space-age minarets towering over Islamabad.

A mere stone's throw from Islamabad exists a spectacular display of three millennia of humanity's progress.

These stairs were built to accommodate royals mounted on elephants.

This dazzlingly turquoise mountain lake was created in the wake of a natural disaster.

Stockholm's deepest subway station is also a stunning ecological wonder.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

Slum Settlement Filled With Mountains of Garbage.

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

A hot dog stand where the heads are just as hot as the dogs.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

This surprising gem is a world-class archeological museum hidden at the University of Chicago.