thai nature wonder namtok salatdai waterfall in nakhon nayok, thailand

namtok salatdai waterfall nakhon nayok thailand natural wonder scenic beauty trekking adventure nature lovers outdoor activities lush greenery refreshing tranquil swimming picnic spot biodiversity wildlife tropical rainforest ecotourism picturesque breathtaking views cascading water pool hidden gem pristine untouched reserve hiking trails flora fauna birdwatching crystal clear blue cool mist serenity rock formations instagrammable tranquility peaceful retreat escapism