The present ICARUS detector, called T600, is ready for installation in the Gran Sasso underground laboratory. It consists of two large cryostats, each one filled with 300 tons of Liquid Argon and equipped with two Time Projection Chambers (TPCs). An overview of the T600 detector is given. Main results of the analyses of the data collected during the surface tests with cosmic rays in summer 2001 are presented. They illustrate the detector's excellent performance. A vast physics program of the ICARUS experiment, which includes different aspects of the neutrino studies and searches for proton decays, is shortly discussed. Finally, the detector upgrade towards the total mass of 3000 tons of Liquid Argon is mentioned.

PACS numbers: 13.20.+g, 14.60.Pq, 29.40.Gx, 29.40.Vj