www.biscaynenaturecenter.org South Florida's splendid weather encourages people to play hooky, and it's a clever Miamian who figures out a way to do it without guilt. The Marjory Stoneman Douglas Biscayne Nature Center is a grand schoolhouse integrated with the great outdoors. The wonderful complex is set against mangroves, nature trails, and even a fossilized reef that make this not-for-profit facility a unique learning center instead of merely a playground. (If you are learning, can skipping a regular class or a day at work be all that wrong?) Guides lead tours through the various environments native to the area while instructing visitors about topics mostly having to do with conservation of natural resources. Some educational displays, exhibits, and art are housed inside, so even bad weather isn't a problem.