If there are times when the sights, smells and sounds of a new destination are best downed in a single, heady, flaming sambuca of a weekend, there are others when a more slow-drip pace is called for. Such is the case with De Alde Feanen, in Friesland. One of the most peaceful national parks in the Netherlands, this 4,000-hectare wetland slows down naturally after the summer season. Its waterways shrug off their summer flocks of kayakers, paddleboarders, boat trippers and terrace diners. Museums and galleries close. The local tourist office winds down. Even the park’s population of nesting storks fly south.… Lês fierder