Turkey's water experiences span a Black Sea coast, an Aegean shore, a Mediterranean coastline, the Bosphorus strait, and an inland lake system of considerable variety. Bosphorus sunset cruise between the Asian and European shores of Istanbul — where the strait narrows to 700 metres and the Ottoman yalı summer residences are visible from the water — is the most atmospheric urban boat experience in the country. Turquoise Coast gulet sailing holidays between Bodrum, Marmaris, Göcek, and Kaş — moving between sea caves, Lycian rock tomb coastlines, and swimming coves inaccessible from land — are the flagship leisure water experience. Cappadocia underground river cave boat tours, Bafa Lake boat excursions to the Byzantine monastery islands, and Dalyan River turtle nesting beach launch tours complete a water geography of considerable variety.