Don't you wish you were here right now? But before you start booking your trips, you have to guess where it is. Do you know which U.S. National Park this gorgeous beach is in?

Log in and leave your guesses below and check back here on Monday for the answer.

UPDATE 6/27/11: This beautiful sunset can be found on the shores of Rialto Beach in Washington's Olympic National Park.

Lyndsey Matthews is an online editorial assistant at Travel + Leisure.

Photo courtesy of T+L's Photo Contest