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Also known as Parque Nacional del Este, this is one of the most cave riddled and adventure-packed national parks in the DR—understandably one of its most visited—counting more than 500 flora species, 300 types of birds, and including long stretches of diamond white beaches on Saona and Catalina islands, along with their underwater marine life. Visitors can hike the land portion, accessible from Bayahíbe village, to explore a handful of the park’s cave and freshwater springs along marked trails of varying difficulty, or go birdwatching. On the coastline, snorkeling and diving sites are numerous along colorful coral reefs, and steep walls teeming with sea life. On shore, the park’s sparkling beaches, particularly on Saona Island, is the most important turtle-nesting site in the Dominican Republic.