Architecture of Madrid of Music is a work of 1988. In the 21st century, Madrid faces new challenges in its architecture. An old industrial warehouse is the Interpretation Centre of New Technologies, and the CaixaForum Madrid (Herzog & de Meuron) was a former power station. Under the government of Alberto Ruiz-Gallardón the four tallest skyscrapers in Spain were built, and together form the Cuatro Torres Business Area (CTBA). The Manzanares River is crossed by new edge bridges, and work started on the International Convention Centre (Mansilla+Tuñón), an original round building, whose works remain paralyzed by the crisis. Caja Mágica (Dominique Perrault) sport centre
Madrid Metro being postponed and canceled. Unlike normal Spanish road and rail traffic, which use right hand drive, Madrid Metro trains use left-hand running on all lines because traffic in Madrid drove on the left until 1924, well after the Madrid Metro started operation. The Madrid Metro operates every day from 6:00 am until 1:30 am. A light rail system feeding the metro opened in 2007 called Metro Ligero ("light metro"). The Cercanías system works in conjunction with the metro servicing commuter train services to and across the city. Some underground stations are large enough to hold public events, such as the