A trip/walk down memory lane
Definition 1 of 1
Pro Tip 1/3Nostalgic Context
Use this phrase when talking about experiences that bring back good memories. 
Our high school reunion was a real trip down memory lane.
Pro Tip 2/3Emotional Bond
Best for sharing memories that create a bond with others who share the experience. 
Remembering our college days is always a walk down memory lane.
Pro Tip 3/3Conversation Starter
Start a conversation by asking someone to take a trip down memory lane with you. 
Let's take a trip down memory lane and talk about our favorite childhood cartoons.