resak tembaga wooden bridge and ecotourism attraction in nong yai royal development initiative projects and kaem ling regulating

architecture attraction beautiful bridge building chumphon destination development eco ecotourism environment famous forest garden green holiday idyllic initiative kaem lake landmark landscape ling natural nature nong outdoor park people plant pond popular project projects recreation regulating resak reservoir river royal scenery scenic sightseeing swamps tembaga thai thailand tourism tourist travel travelers tree trip tropical vacation visit water wood wooden yai