Translation of investigate in Spanish

At the end of October my family will be taking a short vacation to Biron Bay north of Sidney. My wife wants to visit the coast. There are many good restaurants near Brion Bay with fresh seafood.
Well I take Spanish classes in college, that's the only useful language they offer, but if they had French I would be taking French. It sounds so nice. I have been lazy lately and I'm not really good at it.
The border control was in the middle of the Andes mountains, at an elevation of around 2000 meters above sea level. The forest around us was covered with snow and the scenery was breathtaking.