A lush Seattle garden designed by the same landscape architects responsible for New York's Central Park.

This beautiful landscape is the only Sichuan-style garden outside of China.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

The final resting place for the famed creator and narrator of "The Twilight Zone."

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The oldest residential street in Europe also features an optical illusion.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

This secret collection of the strange and occult was rediscovered in a forgotten room of an old house.

Flowers have mysteriously appeared on her effigy every day for the last 150 years.

This ancient tunnel is one of the most important examples of Roman hydraulic engineering in Spain.

This ancient Irish landscape boasts hundreds of legendary ruins.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

Wander among the abandoned ruins of this once-powerful medieval town.

This landmark Victorian folly rewards visitors with spectacular views over the Peak District.