From 07.00 to 24.00 access to the basement car park through the tunnel shopping center near the World Trade Centre hotel Exelsior, or through the hotel itself. This coastal guns - one of the few remaining signs of the colonial past and the main attraction of the area. Their guns fired every day at noon - hence the name. Where did the tradition, no one knows. One version - at midday shot sailors checked against the ship's clock.   I can complement the description