Altair is a residential and commercial development in Colombo, Sri Lanka. The building has a 68-floor vertical tower and 63 floor leaning or sloping tower. At 240.0 m (787 ft), the building is the second tallest building in Sri Lanka, and its East tower the tallest inclined building in the world. The building is situated on the banks of the Beira Lake on a 2-acre plot of land leased by the Urban Development Authority of Sri Lanka to the Developer Indocean Developers. Development was halted for five years, and then restarted in 2020. The first phase of the building opened in March 2021.