Can you believe it's Friday already? Time for another round of "Guess Where?" Do you know where these seaside ruins are located? Log in and leave your guesses below. Check back on Monday for the answer.

UPDATE 8/22/11: Everyone guessed correctly that these are the ruins of San Francisco's Sutro Baths. Looks like we'll need to make this harder this week.Lyndsey Matthews is an online editorial assistant at Travel + Leisure.