What do certain smells remind you of?

I have heard that certain smells seem to remind you of certain events that have already passed. For example, (I don’t know if this is true, but I’ve heard that this supposedly works) if you chew mint gum or suck on a mint while studying for a test, and then during the test suck on a mint (or chew gum either one) you will remember what you had been studying for the previous night. Apparently, memories and scents are linked to your brain and your nose which helps bring back memories and events from previous times. I’m no doctor, but I can see how this may be true. When I was in Paris, I used to wear this certain perfume everyday, and then stopped using it for a year. Then, when I decided to spray some on (some time later..way after the trip) I felt like I was in Paris again! It was the most interesting feeling and it made me feel young again! So, I have decided to ask the collective intelligence, what smells bring back memories to you? What are the smells and what do they remind you of?