One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

This old residential building was once the largest flour mill in the world.

The only arched bridge made of stone on the entire Mississippi River.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

The decor of this Hollywood movie palace just barely predated the opening of King Tut's tomb.

The blinking light atop the iconic landmark has been sending secret messages for decades.

60 feet of towering steel balances gracefully.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

Dozens of feral felines rule a segment of Hollywood's only graveyard.

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

This brightly made over hotel hides decades of suicide, serial killers, and mysterious deaths.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

Magical-looking cottages that inspired one of the most famous animated films ever.

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

The private clubhouse for the members of the Academy of Magical Arts.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Resting place of Hollywood's immortals is also site of summer film screenings.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

The legendary building that needed ghostly approval before being built.

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

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

This free, take-a-book shop seems like a trick but isn't.