De Biesbosch National Park

Listen for a moment. Water moves somewhere close, slapping softly against reeds you cannot quite see. A reed warbler chatters from the bank. The air smells of wet willow bark, river mud, and something green and sweet. Under your feet the path may feel soft, almost springy, because much of the ground here was river bottom not so long ago. Welcome to De Biesbosch, on the eastern edge of Dordrecht, one of the largest freshwater tidal wetlands in Western Europe.

The name gives you a clue to what you see. In Dutch, a bies is a bulrush, the tall rush that grows along the water's edge. A bos is a wood. So the Biesbosch is, quite literally, the rush wood. It is a maze of creeks, channels, willow thickets, reed beds, and small islands. From the air it looks like the veins of a leaf. From a canoe, it feels like a labyrinth that changes every time you turn a corner.

Here is the first surprise. This wild place was not always wild. Six centuries ago, this was farmland. Villages, churches, and fields lay here, protected by dykes, in a polder called the Grote Waard. Then, in November 1421, a great storm flood struck. History knows it as the Saint Elizabeth's Flood. The dykes broke, the sea and the rivers poured in, and many villages vanished under the water. Many people lost their lives, though no one knows the exact number.

Out of that disaster, a story was born. Legend has it that after the flood, a wooden cradle floated across the water. Inside lay a baby, still dry. A cat jumped from side to side on the cradle to keep it balanced until it reached safe ground. Nobody can prove the tale. But people in this region still tell it, and you will find it in local books, paintings, and even in place names nearby.

After the flood, the rivers did slow, patient work. The Rhine and the Maas carried sand and clay into the drowned land. Twice a day, the tide from the North Sea pushed water in and drew it out again. Mud banks rose. Rushes and reeds took hold. Over generations, a new landscape grew from the silt. This mix of river water and sea tide is rare. It produced a freshwater wetland that rises and falls with the tide, like a coastline far from the coast.

People came back, but not to farm. They came to cut willow. Look at the low, bushy willow thickets along the creeks. The Dutch call them grienden. For centuries, workers cut the young willow shoots by hand. The flexible twigs became baskets, hoops for barrels, and above all, woven mats used to strengthen dykes and riverbanks. The work was hard and wet. Many cutters lived for weeks at a time in simple huts out here, far from their families.

That trade faded in the twentieth century, when concrete, steel, and plastics replaced willow in dyke building. Many old willow thickets were left alone and grew tall and tangled. Today, some of them look like a jungle. Trunks lean over the water, covered in moss and ivy. Branches split and grow again in strange shapes. When you walk past an overgrown griend, you are looking at the abandoned workshop of a lost profession.

The second great change came with the Delta Works. After the North Sea flood of 1953, the Dutch began building huge barriers to protect the southwest of the country. In 1970, the Haringvliet dam closed off a major sea inlet. The effect here was dramatic. The tide, which once rose and fell by around two metres, became much smaller. Mud banks that once flooded each day stayed dry. Some plants and birds that need the daily tide began to disappear.

So the Biesbosch had to find a new purpose. Part of the area became farmland again. Large reservoirs were dug to store river water, and today they help supply drinking water to the Rotterdam region. In 1994 the area was made a national park. In recent years, under a national programme called Room for the River, some farmland was given back to the water. Dykes were lowered, and creeks were reopened, so the rivers have more space during high water.

Now for the animals, and here is a surprise many visitors miss. In 1988, beavers were reintroduced to the Biesbosch, after centuries of absence from the Netherlands. They did well. Look along the banks for willow stumps cut into sharp points, like giant pencils. That is beaver work. You may also spot their lodges, untidy domes of sticks and mud. Beavers are shy and mostly active at dusk, so you are far more likely to see their signs than the animals themselves.

Look up, too. The white-tailed eagle, the largest bird of prey in the Netherlands, has returned to nest in the Biesbosch in this century. Its wings are so broad that people sometimes call it a flying door. You may also see cormorants drying their wings on dead branches, grey herons standing still in the shallows, and a kingfisher flashing past low over the water, bright blue and orange. In spring, the reeds fill with birdsong from early morning.

The best way to understand this place is from the water. Boat tours leave from the visitor centre on the Dordrecht side, and you can rent canoes or small electric boats to explore the narrow creeks yourself. On foot, short trails lead through willow woods and along open water. Bring patience. The Biesbosch rewards people who sit quietly, turn off the engine, and let the reeds and birds return to normal around them.

Before you go on, stop and look around you once more. The water in front of you began its journey in the Alps and the Ardennes. The ground beneath you was once a village, then a sea, then a mud bank. The willows beside you were planted by people whose names nobody wrote down. Listen again to the reeds moving in the wind... This landscape is still changing, slowly, every day. As you walk away, notice how quiet it becomes.