Apo Reef

About

Apo Reef is a coral reef system in the Philippines situated in the western waters of Occidental Mindoro province in the Mindoro Strait. Encompassing 34 km2 (13 sq mi), it is considered the world's second-largest contiguous coral reef system, and is the largest in the country. The reef and its surrounding waters are protected areas administered as the Apo Reef Natural Park. It is one of the best known and most popular diving regions in the country, and is on the tentative list for UNESCO World Heritage Sites.

Adapted from Wikipedia (CC BY-SA). Photography via Wikimedia Commons.