1. SMOKIN'! Mount Stromboli, an island off the coast of Sicily, erupts every half hour or so; it is almost as predictable as Old Faithful. Stromboli, which is one of Europe's highest volcanoes, is also one of the worlds most spectacular and most accessible places for volcano-watching. You don't even have to climb the mountain to get a good view of the fireworks; tourists hire boats to motor them around the island at night so that they can see the volcano's red flames against the black sky. Videos and photos of eruptions and associated tsunami damage are posted at Stromboli Online.

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