NO PURCHASE NECESSARY TO ENTER. Void where prohibited. "Win a Trip to Costa Rica" is open to all legal residents of the 48 contiguous United States and the District of Columbia who are 21 or older at the time of entry. Giveaway begins at 12:01 AM ET on 6/13/2015 and ends at 11:59 PM EST on 8/5/2015. To view complete rules, click here.