The Flamingo Beach Resort is Your Beachfront Base to Explore All the Adventure and Natural Wonders of Costa Rica Situated in the province of Guanacaste, on the northwest Pacific coast of Costa Rica, the Flamingo Beach Resort is the perfect destination for travelers seeking an enchanting escape. Picture yourself lounging on the pristine golden sands of Flamingo Beach - one of the most beautiful beaches in Costa Rica, framed by the deep blue Pacific ocean and lush mountain foliage.