Playlist - A free and easy way to make a memorable keepsake from your travels could be to ask each new person you meet for their favorite song. Add each to a playlist and title it where you went.
Paintings - Buy a painting from a street artist at each new city you visit. Bring them home for a gorgeous photo wall that keeps track of your travels.
Photobook - Instead of leaving hundreds of photos on your phone, put them together and order a photobook that you can share with your fellow travelers including all the locations you visited.
Travel Journal - Grab a small journal for your trip and document each day’s activities and fun moments at night. Feel like you’re back on the vacation when you read it back at home.