Not seen any sunset cruises from Belek. Nearest Harbour is Antalya and I know they do some cruises during the day. One evening event I didn't go to but think would be great is held at Aspendos the ancient roman ampitheatre not far from Belek. Where they have a show called Fire of Anatolia which is a sort of Turkish Riverdance with fire. Belek is very different from Fethiye and Olu Deniz. It consists mostly of fabulous 5* hotels but not a lot else. Oh yes and Golf courses. There are some good places to visit that we have enjoyed while our men played golf. The Duden Waterfalls were lovely and we enjoyed Antalya harbour. This year we visited Side (about 40 mins away) loved the ancient ruins and the temple of Apollo.