Slovenia's water experiences are concentrated in a small country of extraordinary Alpine and karst river clarity. Soča River kayaking and rafting — through impossibly turquoise water in a narrow emerald gorge between karst limestone walls — is one of Europe's finest white-water experiences, and the Soča's specific water colour (caused by calcium carbonate in the karst) is unlike any other river on the continent. Lake Bled rowing boat tours to the island church (the only island in Slovenia, and one of the most photographed lake views in Europe), Triglav National Park river swimming experiences, and Lake Bohinj — quieter, deeper, and less visited than Bled — boat and kayak excursions add the Alpine freshwater register. Krka River kayaking in the Novo Mesto region and traditional Lipica karst pool boat tours complete the Slovenian water geography.