a milestone on ba den mountaintop with the height of 986m

landmark tower sea sky blue tourism vacation monument building travel rock reflection coast ruins temple castle milestone den mountaintop height 986m highest mountain southern region tay ninh vietnam travel peak top climbing journey hiking success happiness adventure endurance enjoyment freedom sport vietnam tourism ninh mountain backpack exploration explorer tourist discovery leadership assistance people motivation winning courage travelling highest attraction summit mountaintop tranquility asia scenery pass passes himalayas board ensign milestone landscape accomplishment hills mission mountains desert ayutthaya ancient