The classics are: Peru's Inca Trail, Kilimanjaro in Tanzania and the famous Annapurna Circuit in Nepal. Then there are some more offbeat routes: Mount Sinai in Egypt
Mount Kilimanjaro, Tanzania
The Toubkal Circuit, Morocco
Simien Mountains Traverse, Ethiopia
Sentiero degli Dei, Italy
Tour du Mont Blanc, France, Switzerland & Italy
Camino de Santiago, France & Spain
Laugavegur, Iceland
Lycian Way, Turkey
It is full of coves, caves and spectacular beaches; And it's infused with aromas of wild strawberry, juniper and pine. Camping is possible, but it's best to stay in a guesthouse