A Cold War site complete with rusty structures, hiking trails, and beautiful views.

A cake-themed art installation tucked away in historic Chinatown.

The house where Good Will Hunting was written is a surreal fairytale abode.

A quirky collection of figurines backdropped by city views is hidden next to a popular restaurant in the Hollywood hills.

The quiet canyon has a tumultuous history involving a doomsday cult.

Everyone remembers Laurie Strode from Halloween, but this is the house where most of the blood was shed.

One man's homage to the sun continues to grow like a glass fractal.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

This subterranean shrine beneath a bike rental store celebrates the iconic Italian scooter.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

A marvel of Byzantine engineering under the streets of Istanbul.

This Greek Orthodox church houses the mummified body of St. Spyridon.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

Makers and sellers of the original and finest York Ghosts.

An important example of architectural history slowly decays in the city center.

This sculpture presents commentary on a life in pursuit of profits.

This hands-on math museum believes in turning concepts into constructs.

Inside this library, the history of Los Angeles is retold through a mural.

This Chinese art gallery is hidden inside the Sunrider Corporation headquarters.

Inspiration struck on this seat outside the Griffith Park merry-go-round.