Mandokgogae Nurigil Observatory Deck sits near the Mandok 1 Tunnel in Busan, overlooking the city's night views and the blue sea. The deck is built along a narrow path, and visitors take in the view with coffee from nearby cafes or from their cars. At night, you can drive the winding road and then walk the deck and the trail. There is no parking lot, so cars must be parked on the edge of the two-lane road.