Palau de les Arts Reina Sofía. A seemingly weightless 45 metres-high (150-feet.) glass-and-metal construction containing one outdoor and two indoor auditoriums. From the ground, it looks somewhat like a giant cruise ship.It was inaugurated in 2005.Surrounded by a green landscaped area of 87,000 square metres and expanses of water of over 10,000 square metres with surrounding walkways, the Palau de les Arts has 4 main halls.