besically in guwahati only the few temples are to seen but if you want to use your 2 days trip than first day you can visit guwahati and next day you may visit shillong nearby guwahati
NEARBY AREA SHILLONG,CHERAPUNJI AND UPPER ASSAM KAZIRANGA NATIONAL PARK, KAMAKHYA TEMPLE IN GUWAHATI,UMANANDO IN BEACH OF THE RIVER BRAHMAPUTR AND MANY MORE