The tara river canyon is the longest canyon in montenegro it is 82 kilometers 51 miles long and is 1 300 meters 4 300 feet at its deepest making it the deepest river canyon in europe the canyon is protected as a part of durmitor national park and is a tentative unesco world heritage site tara river canyon is also second deepest in the world after the grand canyon rafting on the tara river from brtanovice to scepan polje 18 kilometres of beautiful scenery and 21 challenging rapids