Aerial shot of vibrant green wetlands and muddy banks along a calm river navigated by a red cargo ship under a blue sky

saeftinghe zeeland netherlands dutch europe european scheldt national park nature reserve wetlands nature biology geology geography drowned land estuary river sea tides high tide low tide flood flooding flooded river delta exclusive marsh swamp waterway wildlife creek antwerp flanders coastline from above birds eye view green texture tourism wetland zeeuwsvlaanderen wilderness wild horizon mud water boat container ship cargo ship