Halki is 2 hours from the main port of Rhodes and is one of the smaller islands in the Dodecanese. This does not mean it is not worth visiting, though.
Niboro, the port and the busiest town on the island has been designated a ''conservation area''. You can walk through its cobbled streets admiring the tall and colorful mansions with their large French windows, window shop in the few shops, chit chat in the traditional coffee shops and try tasty mezes in the traditional taverns enjoying the view of the port and crystal clear water.
Points of interest include the ruins of the castle of the Knights, the white washed Town Hall and the church of Agios Nikolaos with its impressive and wooden sculpted altar, of cultural value, and the famous mosaic in the yard. Make sure you visit the Old Village just outside Niborio, the first capital of the island, which has been declared a UNESCO World Cultural Heritage Site.
If you have time for a refreshing dip, opt for one of Giali, Pontamos, Ftenagia and Areta beaches.