Head off the beaten track in a 4x4 vehicle to experience Rio's flora and fauna. With just ten guests per vehicle, you're sure to enjoy this intimate look at the Tijuca Forest. Tucked inside Tijuca National Park, it encompasses the last remaining tracts of Atlantic rainforest that once surrounded Rio de Janeiro. Covering an impressive 7,900 acres, the park is the largest urban rainforest on Earth with over 1,600 plant species and more than 350 different species of mammals, birds, amphibians and reptiles, many that are close to extinction. As the driver makes his way around the lush jungle, keep your eyes open for birds, butterflies, sloths and monkeys. Visit Chinese Lookout and take in panoramic views of Corcovado and Sugar Loaf mountains, Ipanema and Leblon beaches, and the Rodrigo de Freitas Lagoon. And stop at Taunay Falls before returning to the pier past a long stretch of beautiful beaches.