No ocean ? No problem . Innovative boarders are surfing city rivers . Comment: China 's `` Silver Dragon '' is world 's largest tidal bore . Land-locked Switzerland is home of snowboarders-turned-surfers .
No ocean ? No problem . Innovative boarders are surfing city rivers . Munich 's Eisbach River attracts young thrill-seekers late into night . China 's `` Silver Dragon '' is world 's largest tidal bore . Land-locked Switzerland is home of snowboarders-turned-surfers .