An interesting island lies approximately 90 miles off the Península de Osa's western coast. Both on the land and in the dark blue waters surrounding it, ancient artifacts and exotic surroundings await you.
Isla del Caño is surrounded by clusters of surf-pounded rock and is the focus of many an expedition. Intrepid naturalists head for the trails while divers and snorkelers head for the water. Whatever the kick, they'll find it here.
Land side the area is a treat to hike through and a pleasure for naturalist buffs. The path leading up and into the forest from the ranger station is shaded by the dense forest canopy overhead. Monkey ladders grow thick in the forest and hang sturdily from large trees. These terrestrial vines begin as delicate green tendrils with hoof-shaped leaves and with the passage of time become thick and woody in the shape of a ladder. Its "rungs" are often slightly lighter in color, giving the impression that monkeys have worn them down.
Colorful land crabs sidle off the path as do small striped lizards and snakes. Pacas, a small rodent, are nocturnal and rarely seen. Complementing the intricate forest system is the archaeological aspect of Isla del Caño. It is believed to have been a burial site for pre-Columbian indigenous on the mainland. The people and their purpose remain a mystery buried beneath velvety moss and the passage of time.
You will see artifacts off the trail as you hike but refrain from touching or moving them. Pestles, corngrinding tables, and shards of pottery have been found. The most interesting findings are solid rock spheres. These are believed to have been used as markers for graves and are made of granite. not found on the island. How and why these spheres were fashioned, and why they were carried to the island, remains a mystery.
A few of the larger ones can be viewed at the National Museum in San Jose as well as in the area of Sierpe on the mainland. Another tell-tale clue to the presence of these pre-Columbian people is the abundance of milk trees (Brosimum utile) found growing in circles in the depths of the forest. Scientists speculate that they were planted alongside burial sites with a religious significance. The white-sand beaches are cozy and postcard perfect with a large population of hermit crabs.
Their proud little marches are amusing and easy to photograph. Tour operators often serve a picnic on the beach with both crabs and a bold block hawk in attendance. Underwater activity is no less interesting. Snorkeling is recommended for a long look at the beautiful fish population just off shore.
Mahi mahi, groupers, angel fish and puffer fish swim in the ocean's current and among the clusters of brain coral. Visibility is high and on a sunny day, the bright red, yellow and blue hues of the fish stand out in bold contrast to the sand and coral bottom. Watch for moray eels and damsel fish. Divers, equipped with underwater cameras and lights, take to the deeper waters for up-close encounters with common and bottle-nosed dolphins. The reefs are quite large and have a colorful variety of fish.
During particular months, the waters are temporarily occupied by sperm and humpback whales migrating from northern waters. Pilot whales tend to stick around reveling in the warm tropical waters. Day trips are a great way to see this island ecosystem both on shore and in the water. Plenty of sun block, a swimsuit and hiking attire will guarantee your enjoyment while visiting Isla del Caño.
