At Skradinski Buk, seventeen waterfalls change the height of the Krka River by 45.7 meters (about 150 feet) in an area 400 meters (a quarter of a mile) in length and 100 meters (110 yards) wide. The park surrounding this spot—accessible only on a Park boat—is well-maintained, with boardwalks and trails and viewing points to watch the dramatic falls, or just to listen to streams rushing beneath the wooden paths. There were dragonflies in this park of an impossible iridescent shade of blue, and bullfrogs, and a family of swans living under a wooden walk.

The falls of Roški slap drop a total of 27 meters (about 90 feet), so it isn't the most dramatic sight of the Krka river. But this part of the Krka has historically used the power of the falls to operate mills, for grinding grain, rinsing cloth, making wool, and, in the twentieth century, producing hydro-electricity.

One of the water mills at Roški was operating during our visit. In the room behind this one, the rushing stream pushed a water wheel, which turned the spindle under this grindstone. Kernels of corn are dispensed into the small hole in the center of the stone, where they are ground to a powder by the spinning of the stone. On every rotation, a slightly raised area on the top of the grindstone lifts the small wedge of wood that is leaning on the stone, releasing another small amount of corn to grind.

This town is Skradin, the gateway to the Krka National Park. It's a very typical Croatian look, with a single steeple in the center of the village. The houses of the Croatia we've seen are almost all single, two-story homes with red terracotta roofs.