Rather than the gorges of the Danube (in the Iron gates area), it is the delta of the Danube River which should be a priority for exploration, because it displays a wild ecosystem that is unique in Europe. Since 1990, the site has been one of the world biosphere reserves selected by Unesco. Amidst rush and reed, the land is good for bird watching. You can see over 250 migrating bird species, of which there are 2,500 pairs of white pelicans, meeting here in the spring and autumn. Avocets, egrets, swans, ducks and plovers frolic freely above the lakes that are covered in water lilies and duckweed. On the banks and the alluvial soil, thick forests grow strong as a mixture of willows, ash and oak trees. If you wish to visit the delta, the best thing to do is to go to one of the ports (Galati, Maniuc, Crisan) by tourist shuttle, then see if you can get the help of a fisherman on a rowing boat to cross the canals. At the far ends of the branches of the delta, you can see some fishermen's villages with their clay and thatch huts, some of which are inhabited by people of Russian origin. The starting point for most excursions is the town of Tulcea. Here, travel agencies and hotels organise cruises or fishing expeditions.