Tara River (Montenegro). 'It’s hard to get a decent view of the beautiful Tara Canyon – its tree-lined walls, up to 1300m high, tend to get in the way. The effect is most impressive from the water, which goes some way to explaining why rafting is such a popular activity. You’ll hit a few rapids but outside of April and May it’s a relatively gentle experience, gliding over crystalline waters through a landscape untouched by human hands.' http://www.lonelyplanet.com/montenegro
Tara Canyon , Montenegro-The Tara River cuts the Tara River Gorge, the longest canyon in Montenegro and Europe and second longest in the world after Grand Canyon, at 78 kilometers in length and 1,300 meters at its deepest.