There are many enterable buildings in each city. These buildings you can enter and destroy. Safehouses are enterable buildings as well, and are visible on your map. Enterable buildings usually have an off white door. Tanner can push the door open when he nears it. It is fun to enter these buildings, however some have a Timmy Vermicelli.

The list will show you a few Enterable Buildings. Some places don't have doors but allow you to walk around them.

Enterable Buildings in Driv3r-Edit