curl -H "X-API-Key: YOUR_KEY" \ https://waterapi.nl/api/v2/waters/NL
GET /api/v2/waters/NL?city=Amsterdam GET /api/v2/waters/nearby?lat=52&lng=4
POST /api/v2/submit/NL { "name": "New Lake", "lat": 52.37, "lng": 4.89 }