This star-studded Old Hollywood restaurant is where fettuccine Alfredo made its United States debut.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

This serene oasis in an affluent Los Angeles neighborhood holds some of Gandhi's ashes and got Elvis into Eastern Philosophy.

World-famous, Pink's still manages to keep its prized cult fetish status.

The final resting place of a space program monolith.

Historic funicular railway, believed to be the shortest railroad in the world.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Yo, Adrian!

Famously misunderstood wonder of the ancient world

The "Seinfeld" diner.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

Avoid gangster interaction while window-shopping.

Visit the monolithic tomb of America's most famous general.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

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

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.