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The Children’s Eternal Rainforest, or Bosque Eterno de los Niños, is a 55,000-acre private nature reserve in Costa Rica. In 1987, a group of Swedish schoolchildren learned about the rain forest.

The California Academy of Sciences brims with plenty of things to see, including an aquarium, a planetarium, a natural history museum and even a rainforest. The Steinhart Aquarium is home to about ...