There are several lakes that make beautiful day trips. Some lend
themselves to fishing and boating and other recreational activities.
Lago San Juan Laguna de Fraijanes Arenal Lake
This is Costa Rica's largest lake and it also offers the most activities
for the tourist. It is located near the Arenal Volcano, an active volcano
with a perfectly cone shape. There is fishing for rainbow bass (guapote)
a very challenging fish. Windsurfers from around the world come here to
enjoy the near-perfect conditions in March.
Lake Caño Negro
This lake is interesting because of its protected status. The Caño
Negro National Park offers a beautiful foray into virgin wilderness.
Although this lake is not in Costa Rica, it's mentioned because its outstanding
features. This is the largest lake in Central America, with islands and
even an island that has an active volcano. Sharks are found here which
were previously thought to have been the only freshwater species in the
world, but they were later found to be Tiger sharks that swam up the San
Juan river. An expedition to this lake is a beautiful and rewarding experience.