aerial view of the ha long bay, halong bay, vietnam. cruise ships and islands alternate in the bay. sunset

aerial view long bay halong landscape vietnam nature travel tourism ocean floating holiday limestone tour harbor majestic cruise coastline attract tourists asia arrival freshness viewpoint exotic vacation sunset sky tropical dramatic gulf rock water famous boat background mountain panoramic ship deck quang ninh clear blue barge sailing asian sea sunrise beach amazing tourist unesco world heritage natural wonders eco island site popular destination province ships islands alternate top ha? vietnam bay