San Francisco, CA April 15, 2011 The San Francisco Waterfront Challenge, a new weekly "identify-the-photo" game, is giving prizes to waterfront-savvy locals and visitors of the city.

The challenge starts on April 20th and continues for six months.

One prize will be awarded each week with prizes ranging from two free tickets for a Red and White Fleet Bay Cruise to free appetizers at Knuckles and Eclipse restaurants.

Here's how it works:

Each Wednesday at noon, a photo taken somewhere along San Francisco's waterfront, from the Golden Gate Bridge to AT&T Park, will be posted online at San Francisco Waterfront

SF Waterfront Challenge rules are on the website.

The first person who identifies the location where the photo was taken wins that week's prize.

Answers must be emailed to challenge@sf-waterfront.com.

All photos used in the contest can be found in the San Francisco Waterfront iPhone app, so that even people who have never set foot in the City by the Bay can participate.

Winners will be announced each week on the San Francisco Waterfront website.

The contest is sponsored by Knuckles at the Wharf/Hyatt at Fisherman's Wharf, the Red and White Fleet, and Eclipse at the Hyatt Regency San Francisco.