Big Surf water park is in the Phoenix metro area of Arizona and as you can see there’s a giant old school Pepsi logo in the pool. Thanks: Rich Kaszeta

In 1923, the words “South San Francisco the Industrial City” were painted on Sign Hill (It presumably had a different name before that) and five years later, the 60 foot letters were put into cement. Thanks: JoeM & others.

I didn’t expect submarines to be found easily, but we’ve actually had quite a few. The first is in Point Loma peninsula in San Diego Harbor, CA. Directly in the centre of that map, next to the dock, is a…

Castro Street is a street in San Francisco, California. Between Market Street and about 20th Street, it is at the heart of that city’s gay village. When this shot was taken the Castro Street fair was on – you can…

The 100-acre Warner Bros. Studios, CA is where hundreds of movies and TV programs have been filmed. In the centre of this shot you can see the famous WB water tower. Thanks: Fletcher

In Miami, Florida there’s the Pro Player Stadium, home of the Florida Marlins and Miami Dolphins. You can clearly read IOWA in the end zone, which dates this photo to around January 2nd 2003 when USC beat Iowa 38-17 in…