Road Trip Pic of the Day, 8/7: What is this?

If you know what today's picture is, you could be eligible to win a prize in the CNET Road Trip Picture of the Day contest.

If you know what this is and where it is located, you could be eligible to win a prize in the CNET Road Trip Picture of the Day contest. Daniel Terdiman/CNET

Update (Tuesday, 10:26 a.m. PDT): The answer to the August 7 challenge--which 289 people got--is 30 St Mary Axe, the Swiss Reinsurance Building, usually known as "The Gherkin." Thanks to all who played Sunday, and all summer: Sunday's challenge was the last one. Please stay tuned to find out the grand prize winner of the Road Trip 2011 Picture of the Day challenge And please come back next summer for the Road Trip 2012 Picture of the Day Challenge.

Welcome to the Road Trip Picture of the Day contest. This is your chance to win some cool prizes as you test your skills at recognizing pictures.

For ten weeks, I've been posting a new photograph from my various travels each day, and your job has been to try to correctly identify it using any means at your disposal. Throughout Road Trip 2011, which took me to a number of countries in Western Europe, there was a new challenge each day, and the opportunity to win some great prizes.

Now, on to today's challenge, the last one for Road Trip 2011. Please note: I will be off the grid and away from the Internet until late Monday, and will not post the answer to today's challenge until then. Also, today is the final challenge, and this week, I will determine who has won the Road Trip Picture of the Day grand prize by submitting the most correct answers. Please stay tuned to find out who won.

If you know what this is and where it's located, please send me an e-mail with both pieces of information (to daniel*dot*terdiman--at--cbs*dot*com) by 6 p.m. Pacific time today.

Please note: To be considered, you must include the phrase "Picture of the Day challenge" in the subject line of your e-mail. No other methods of entering are guaranteed to be considered.

And please forgive me if you don't hear from me if you're not the winner. I get dozens of responses each day. Also, I've turned off comments because otherwise people will post the correct answers there. I hate to shut down discussion, but I want you to figure out the answer on your own.

The giveaways
This year, I'll be giving both a weekly prize and one grand prize at the end of my Road Trip project. Here's how it will work:

For the weekly prize, I'll pick a winner at random from among all those who correctly identified one of that week's daily challenges. You get one entry into this drawing for each correct entry you submitted that week.

For the grand prize, which is a major brand video game console, the winner will be the person who answers the most daily challenges correctly during the entire project. So there's definitely an incentive to play every day and to answer correctly as often as possible. Be warned: last year, there was no shortage of people who had the right answer most of the time, so the competition for the grand prize will be stiff.

Given the constraints of the work I'll be doing on Road Trip, I have to minimize the complexity of the Picture of the Day challenge, so if you want to accumulate right answers and compete for the grand prize, you must use the same e-mail address and name each time. If you use a different name or e-mail address, your answers won't be counted together.

For complete information and rules about the Picture of the Day challenge, please click here .

Good luck today, and throughout the summer.

The disclaimer: NO PURCHASE NECESSARY TO ENTER OR WIN. MUST BE A LEGAL RESIDENT OF ONE OF THE 50 UNITED STATES OR D.C., 18 YEARS OLD AND AGE OF MAJORITY OR OLDER IN STATE OF RESIDENCE AT DATE OF ENTRY INTO SWEEPSTAKES. VOID IN PUERTO RICO, ALL U.S. TERRITORIES AND POSSESSIONS AND WHERE PROHIBITED BY LAW. SWEEPSTAKES ENDS 11:59:59 PM PT ON 8/7/11. SEE OFFICIAL RULES FOR DETAILS.

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