beach dangers hut lifeguard lifeguard-towers lifeguards look-out lookout lookout-tower observation observe ocean prevent-drownings prevention protect protection safety scan scanning seashore shark-spotting shelter structure structures supervise supervision swimmers swimming tower volunteers watch ALS architecture Australian-Lifeguard-Service beaches coast coastal emergency-service holidays outdoor popular raised recreational-beaches rescue sand seaside shore sights surfers swimmer-rescue tourism tourist tourists traditional travelling travels water-rescue water-sport-participants landscape lifeguard tower palms summer guard safe sea swim water army british duty horse guards London military parade sentry soldier uniform winter boat canada city dinghy security vancouver drawning ring ship sign Cadiz flag adults bathing board riding board surfing boards children distance distant expanse fun kids leisure numerous open area outdoors outside people public safety flags sport sporting sunbathing surf waves wide-open space