Relics of the 1894 Midwinter Exposition continue to delight visitors today.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

This little-known national museum houses over 40,000 works of art from across the world.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

A unique seaside cave where Aleister Crowley faked his own death.

This eatery transports diners to a place that no longer exists: East Germany.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

Shoot for par over the bodies of the dead on this cemetery-cum-golf course.

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

An art supply shop holds the secrets of this quiet neighborhood's raucous Barbary Coast past.

Longtime headquarters of controversial boys' club for the world's wealthiest and most powerful.

This 19th-century church is now a popular roller rink.

Gold Rush-era tombstones line the park's paths.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

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

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

Charnel house at the foot of Mount Sinai.

The deadliest diving spot in the world is also a stunning geological marvel.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

In Egypt's expanding metro area, many of the neighbors are dead.