Four miles [6 km] southeast of San Pedro is the Hol Chan Marine Reserve, three square miles [8 sq km] of shallow underwater park featuring a cut, or channel, through the reef.
Enam kilometer di sebelah tenggara San Pedro terdapat Cagar Laut Hol Chan, sebuah taman laut yang dangkal seluas delapan kilometer persegi berbentuk terowongan karang.