There are a lot of ways to keep memories of your travels, like collect postcards and stamps. But if space and money is a big concern, then you might want to consider this DIY travel project.
All you need is a corkboard (but I used a styrofoam that cost PHP50/$2), a big world map, glue and a bunch of pins. A colored push pin will do but I’ve decided to use flag lapel pins that I purchased from their respective countries (except for England, but that’s where I bought my vintage map!) to make it more special. :)