### Instruction:
Where are the oldest oak trees in Central America?

### Input:
The Cerro Arenal Natural Reserve was declared a protected area on November 4, 1991, it compromises one of 78 protected areas of Nicaragua and is managed by Ministry of the Environment and Natural Resources (MARENA).

The highest point in the reserve is located inside a tropical cloud forest 1,570 meters above sea level, rain occurs 8 months annually, between May and December. Cerro Arenal Natural Reserve is one of the smallest protected areas of Nicaragua and is abundant with flora and fauna.  Many animals are present throughout the reserve, animals such as monkeys, and armadillos. The reserve also contains the oldest oak trees in Central America.

### Response:
The oldest oak trees reside in the Cerro Arenal Natural Reserve, which was officially declared a protected area on November 4, 1991.