beach foam sea Seafoam seashore shore shore line coast coastline lake pebbles rocks stones water Denmark horizon line pebble sand seaweed stone strand tide coast line coral Coral on beach drift washed up lap lighthouse ripple natural nature pattern ridge rill texture tidal wet Barmouth bridge Causeway estuary gantry girders hills iron metal railway resort wales welsh city clouds cloudy cold high highrise metropolis northwest rise Seattle shoreline urban Washington waves crossing destination direction moving train transport travel drown kids road rock route summer sun under underwater wave adult-bird aquatic black black-winged-stilt cautious distance distant dog-bird himantopus himantopus large long-legged longshanks mature pied-stilt protective shore-bird shore-line stilt territorial wader wading wading-bird water-bird white white-headed-stilt widespread young