Jeff says:

This is located over a marsh in South Louisiana. This is the area where I sail, and I was scouting out possible anchorages when I saw these birds.

Someone apparently said in the comments that yes, this definitely is a flock of birds – geese in fact, picked up because they fly so high. So cool, thanks Jeff!

Another post for the Crowds category is the packed Union Square in San Francisco. I have no idea why crowds seem to only form in San Franciso. I also have no idea what all those people are doing there?

Thanks: JVM

A sea of people in Golden Gate Park at what looks like a day time concert. Can anyone identify who’s playing?

Thanks: Chuck Cheeze

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 make out the white tents in the middle of the streets and the sea of colour around them are the hundreds of people.

The first stadium is the San Francisco 49er’s Stadium Monster Park (formerly 3com park) (thumbnail #1 below) and it seems they were playing at the moment the photo was taken.

There’s lots of stadiums in this shot of Philadelphia In the North West there’s the Veterans Stadium before it was demolished on March 21, 2004, North East is Citizen’s Bank Park still under construction (opened April 9, 2004) and South East is Lincoln Financial Field (opened August 8, 2003). In the South West is First Union Center & First Union Spectrum, each with large type on the roof.

Lastly we have the amazing Olympic Stadium complex in Montreal (thumbnail #2 below), which was built for the 1976 Summer Olympic Games.

Thanks: sixtoe, Dean, Allen, many others.