For this achievement you need to find all
35 Drive-Thru shops AND find and enter all
11 Car Parks.
Throughout the Paradise map there are:
5 Junk Yards (Red icons with Claw)
5 Paint Shops (Blue icon with paint can)
11 Auto Repair Shops (Blue icon with wrench)
14 Gas Stations (Blue icon with gas pump)
11 Car Parks (Dont appear on the game map but have Yellow 'P' signs outside)
Here is a map for all the Drive-thru shops:
You
do not need to pass through the shops, only pass by them so that they are added to your map (Will say X of Y found for each type under the mini map)
Here is a map for the Car Parks acompanied by a video:
More details on Car Parks found here:
Solution for Paid and Displayed In Burnout Paradise