Drone Ascending Over Ninh Binh Bird Park with Karst Mountains Backdrop in Vietnam

drone ascending paddled boats tourists ninh binh bird park karst mountains limestone vietnam aerial view nature wildlife scenic adventure outdoor leisure travel explore excursion river waterway birdwatching natural habitat serene tranquil wildlife sanctuary paddleboats wildlife watching beautiful relaxation serenity ecotourism wildlife conservation biodiversity nature reserve canopy trees bird park experience birdwatchers sightseeing ninh binh province ecological ecofriendly sustainable tourism ecopark boating park visitors peaceful calm