Slightly smaller than Lake Michigan 800 miles of coastline.03% of Earths surface, but 5% of Earths biodiversity Over 130 species of fish, 220 of reptiles, 1,000 butterflies (10% of the worlds butterflies are in Costa Rica!), 9,000 plants, 20,000 species of spiders and 34,000 species of insects! 25%+ of land protected in national parks and refuges Costa Ricas marine area is approximately 10 times larger than its land area. There are more than 121 volcanic formations in Costa Rica, and seven of them are active. Poas Volcano has the second widest crater in the world. Arenal is one of the ten most active volcanoes in the world. Monkeys are one of the most common mammals in Costa Rica. The four common species are the Howler, Spider, White-Faced and Squirrel. There are more than 100 different protected areas to visit.