Tigre Delta, less than an hour by train from Buenos Aires, is a watery world of islands and little rivers, and if biking B.A. is the hot new action tour, kayaking the Delta is capturing the fancy of travelers to Tigre. And why not, for exploring by kayak is site appropriate: paddling under overhanging willow branches and past wooden houses on stilts that dot the banks, spotting birds in quiet back waters, dining with the locals at small island parrilla. Of course, don’t skip by the gateway town is Tigre, with its beautifully resorted Museum of Art (formerly a casino); Victorian mansions along the waterfront Paseo Victoria, and the Fruit Market docks, center of the action with hundreds of stalls selling furniture, handicrafts and of course produce coming in and going out—especially on weekends—on the Rio Lujan.