A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

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

Giant, friendly pelicans in Central London, the most unlikely of places.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

Thirteen trees representing the original thirteen colonies were planted with soil from historic Revolutionary battlefields.

This historic hub for labor unions has survived the city's changing landscape.

42nd story Pyramid shaped penthouse tops Seattle's oldest skyscraper.

The palatial McDonald's that inspired Wesley Willis.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

Illegal drag racing two stories beneath Chicago’s streets.

The only surviving prototype of Buckminster Fuller's revolutionary car.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

Perhaps the world's only gas station inspired by a political scandal.

In Washington's Yakima Valley lies a town "where dinosaurs roam."

A giant donut stands as a popular symbol of Los Angeles iconography.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

This municipal playground was co-created by the father of one of the most playful characters ever.