South of Gränna lies the Röttle. A summer idyll and a national heritage village with old mills, a waterfall and a jetty.
Two mills, Rasmus' Mill and the Jerusalem Mill, date back to the village's glory days in the 17th century. Along the stream there are also the remains of two more mills and the village's first power station. The old inn is preserved by the local village society.
Rasmus' Mill has been restored to its original condition. Its three waterwheels and three pairs of millstones once again grind grain. There are demonstrations and guiding during the summer.
The stone built mill was erected 1662 as a drilling shop and was later modified to mill around year 1700. The Jerusalem Mill from the early Middle Ages is as construction a unique relic and one of the country's oldest secular buildings. It's three stories high and secured to the rock wall.
For nature lovers and botanists the stream's ravine and the footpaths south of the village are rarities. Here are for example lovely groves of oak trees. The area is geologically interesting as part of the so-called Visingsö formation.