local street road go to sipiso piso mountains beside danau toba lake and tao batak toba caldera supervolcano in simanindo city of

asia asphalt batak beautiful country countryside danau destination environment forest freshness highway hill holiday idyllic indonesia indonesian island journey lake landmark landscape mountain natural nature ocean outdoor park reservoir river road rural samosir scenery scenic sea sightseeing stone street sumatera sumatra summer toba tourism tourist travel trip tropical vacation valley