A fortified city, home to a remaining population of five families

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

Morocco's Argania trees are infested with nut-hungry goats.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

Go inside to really appreciate this 500-year-old technological masterpiece.

This knockout museum lies in a sleepy corner of London.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

An enormous, inside-out glass globe built in 1935.

An emerald-green grotto just a short trip from Austin.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Continuing the tradition of the dime museum in style.

The Laureates here get something even more coveted than a Nobel Prize: free parking for life.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

Oakland's beautiful monumental cemetery.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

An Alaska livestock farm devotes itself to harvesting wool from creatures that once ran with mammoths and sabertooth tigers.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

Site of the greatest known waterfall that ever existed.

This sci-fi gazebo located in a Washington power town is made from old bits of industrial electrical equipment.