You'll be met at the airport and transferred to your hotel. Depending on your energy and interest, you can explore some of San Jose's best attractions, such as the Jade Museum,Costa Rican Art Museum, Museum of Pre-Columbian Gold or stroll in the Parque Nacional, where you can smooch on park benches like the young locals do. Or relax and recharge at the hotel in anticipation of the adventures ahead. Overnight San Jose.

(Accommodations, San José)

Your guide picks you up early for a drive through verdant farmland to the wild and scenic Pacuare River. After a stop for a typical Costa Rican breakfast, you reach the edge of the tropical rainforest inside the protected Pacuare area, where you get a short course in white-water rafting and rafting safety. Soon, you and your river guide are gliding past tropical foliage, colorful birds and butterflies, and through some Class II and III rapids. Perched on the banks of the river is Pacuare Lodge, considered one of the world's premier eco-lodges with palm thatch roof. Your private jungle bungalow has a river view and a welcome drink waiting. Enjoy a gourmet lunch then relax or take a zip-line canopy tour of the treetops. Dinner is served with candlelight, Champagne and a serenade by treefrogs. Fall asleep to the sounds of the river outside your window.

(Breakfast, San José; Dinner, Accommodations, Pacuare Lodge)

Wake up to sounds of birds singing and enjoy a hot breakfast served in the privacy of your bungalow. Cross the river in a gondola to take a horseback ride through the forest to a farming village, where you are invited to visit a home and a school supported by Avanti's local partner, who promotes environmental education and reforestation to offset the impact of tourism. Plant a tree, then stop at a waterfall for a refreshing dip. It's a short ride back to the lodge, where lunch and a leisurely afternoon await. Enjoy a massage, aromatherapy or other treatment using local, natural products at the spa. Or watch the birds - the surrounding area is home to an extraordinary diversity of exotic species. Gourmet dinner and overnight at Pacuare. You'll wish you'd booked a third night in this paradise.

(Breakfast, Lunch, Dinner, Accommodations, Pacuare Lodge)

Breakfast at Pacuare Lodge before embarking on an exhilarating white-water rafting trip that take you through class III and IV rapids, steep towering walls of a narrow gorge, sparkling waterfalls, fantastic jungle flora and a rainbow of tropical birds. You're treated to a picnic lunch of sandwiches, fruits and dessert that will be served on an overturned raft along the water's edge before the last stretch of rafting. At Siquerres, change to dry clothes for the drive to Arenal, Costa Rica's most famous volcano.

After the drive, relax with an entrance to the Tabacon Hot Springs at around 7pm then off to your buffet dinner. The spa and dinner are available until 10pm.

(Breakfast, Lunch, Pacuare River; Accommodations, Arenal)

After breakfast, take the Kayak Lake Arenal Tour. Kayak the Arenal Lake! This experience will give you the opportunity to paddle across the mystical and calm waters of the Arenal Lake while the beauty and energy of the amazing volcano penetrates your soul.

Return to the hotel for lunch and maybe indulge in one of the treatments at the award-winning hotel spa. For those looking for a more active afternoon, consider adding on Avanti's optional Arenal hiking tour. This 3.5 hour tour takes you to the area of the 1992 big lava flow, and the area destroyed in the 1968 "awakening" of the volcano. Or for a change of pace, select the 4 hour kayaking tour on mystical Lake Arenal, the country's largest freshwater lake. Overnight at Arenal.

(Breakfast, Accommodations, Arenal)

Breakfast early and start with either the included Ecoglide Canopy Tour (4.5 hours) or another optional tour, maybe the Penas Blancas Safari Float Trip (4 hours). Both tours have morning and afternoon departures, so you can do one in the morning, the other in the afternoon.

The Ecoglide Canopy Tour has 18 platforms and 15 zip-line cables, as well as a Tarzan Swing. Each platform is designed to provide several angles from which to see the forest and its resident flora and fauna.

A professional guide accompanies you on the safari float trip down the Penas Blanca River where you can spot monkeys, sloths, iguanas and a wide variety of tropical birds. Overnight Arenal.

(Breakfast, Accommodations, Arenal)

After breakfast at the hotel, bid a fond farewell to the volcano and depart for San Jose, or your next Avanti destination in Latin America.

(Breakfast, Arenal)