If you are a nature lover and interested in getting to know Halkidiki through forest trails and secluded beaches, then you must trek on the 20 routes mapped out and signaled with a trident. Routes 1-6 are in the peninsula of Cassandra, while 7-12 are located in Sithonia and 13-15 on the periphery of Mt. Athos, while 16-19 are on the hills around Mt. Holomon and no. 20 is located in the area of Olympiada.