Since Malta's Independence in 1964, there has been a rapid increase in buildings all over the country. However, most of the urban areas are concentrated around the Grand Harbour and Marsamxett Harbour areas where some of the country's most busy places are situated; Sliema, Saint Julian's, Paceville, Msida, Gżira, Ta' Xbiex and Pietà. Some of the tall buildings in Malta, such as the Metropolis Plaza in Gżira, are still under construction. The highest structure ever built in Malta was the Delimara Power Station chimney, standing 150 metres (490 ft) above ground, until its demolition in 2017–18.