Landmark 72 (formerly Keangnam Hanoi Landmark Tower) was Vietnam's tallest building from 2011 to 2018, before Ho Chi Minh City's Landmark 81 overtook it; at 350 metres it remains the tallest building in Hanoi. Its Sky72 Observatory deck on the top floor offered 360-degree views over the city along with a small museum and photo installations. Some recent reports suggest the observatory has been closed to visitors, worth confirming current status before recommending a visit.