The Danube DeltaThe waters of the Danube, which flow into the Black Sea, form the largest and best preserved of Europe's deltas.
Great Barrier ReefA place unique in the world, with a remarkable beauty. It contains the world's largest collection of coral reefs.
Base Jump Cave of SwallowsJust when you thought you've seen it all, planet Earth always has something up it's sleeve. And Cave of Swallows is really going to surprise you.
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