Gandoca Manzanillo National Refuge After snorkeling, we drove the remaining couple of miles to Manzanillo, which is as far south as you can drive on the Caribbean coast of Costa Rica. Manzanillo is a tiny fishing village of about 2 blocks in size, blink and you'll miss it! (Truthfully you can't, as it's the end of the road). Here we parked our car and headed for the entrance to Refugio Nacional Gandoca-Manzanillo.