barge boat England english Great Britain Guildford hobby holiday leisure narrowboat navigate pleasure reflection river steer summer Surrey transport travel tree vacation water Athabasca boulder canada current deluge drop falls fierce flow landscape natural nature plunge pour rock Rockies Rocky Mountains torrent turmoil waterfall bank Basingstoke Canal canal green Hampshire oak peaceful rural shadow spring sunlight towpath tranquil trees Banff Bow Falls channel conifers danger dangerous foam rage rapids rocks violent china gorges life preserver life vest Ma Du Madu mini mountain orange protection safety sightseeing tourism tourist avian big cypress bird birds crane everglades Florida ocala oceola sandhill crane swamp wade wading waterway whooping crane wildlife zoo