Built in 1965, the BT Tower is a communications transmitter tower located in Fitzrovia, London. Once a year, the BT Tower opens to the public as part of Open House. The event takes place in September and due to high demand, you need to enter a ballot for tickets. It remained the tallest building in London until 1980, when it was overtaken by the 183m-high NatWest Tower.
photo by: designed by Zlatko Najdenovski from Flaticon