Within Green Garden entertainment centre they offer you the option of renting a go-cart, and ride on one of the best Croatian karting track throughout the year. Opening hours are 09:00 to 23:00 in summer periods from May to October, and 09:00 to 17:00 in winter. Look for more information of http://www.karting.hr/en/index.html
Spectacular view of RT Kamenjak and Medulin or islands Brijuni !!
There is so many wonderful places in the center of Istria, that I will recommend to you one day trip to visit Cave Baredine and little town Grožnjan. Also there is on the way the town Motovun, little town on the top of the hill with spectacular view and wonderful sunset.
Pula is 3000 years old City, with lots of arhitectual monuments.
Amfiteatar is one of the most beautiful and preserved. It is something specail to be in amfiteatar for concert clasical or rock. So if there is some event in amfiteatar dont miss it.