Announcement: September 27, 2014. Arena Centar, the most modern shopping-entertainment center designed by UPI-2M and DI was opened to the public in November 2010. It is located at the south-western entrance to the Croatian metropolis, beside the multifunctional Arena Zagreb venue and has created a new city centre, offering the public a unique shopping, entertainment and sports destination. A modern architecture, ambience and the synergy with the Arena Zagreb sports venue, this centre became the new regional meeting place.