Cayo Santiago is a small 37.5 acre island off the coast of Puerto Rico that reaches a height of 34.9 meters on a rocky hill. The island is home to a population of free-ranging Rhesus monkeys that are descendants of an original group of 409 monkeys imported from India.

1. Cayo Santiago
Puerto Rico

2. Geography
The island measures 37.5 acres, 600 meters
north to south and 400 meters east to west.
While the island is flat in the north, it
reaches a height of 34.9 meters, 2.9 km
southwest of the island's port, on a small
rocky hill called El Morrillo.

3. The island has been the habitat for a free-ranging
population of Rhesus monkeys. The monkeys are the
offspring of an original group of 409 monkeys
imported fromIndia.
About the Monkeys