Journey through lush gardens and rain forest on a 12-day “Botanical Treasures of Costa Rica” tour offered by Calypso Island Tours, based in San Bruno. The Nov. 23-Dec. 4 itinerary features excursions to botanical gardens and horticultural research facilities, including a visit to the private gardens of horticulturist IUeana Tehran, founder of Save Costa Rica’s Orchids. Tour members will also tour Irazu volcano, La Paz Waterfall Gardens and its butterfly observatory, take a jungle cruise in the rain forest and get an opportunity to participate in a reforestation project at Sarapiqui. The tour is limited to 16 people and will be escorted by a professional botanist from Costa Rica. Details: (866) 682—2121.