Top 10 Cheap Things to do in any City in the World. Take a DIY Streetart Tour. Do a Street Performer Scavenger Hunt. Seek Out Free Walking Tours in any city. See How National Bank Holidays and Festivals are Celebrated on the Streets of different countries, for example the Songkran festival in Thailand. Learn a new skill abroad, Put the phone away! Try something new. Maybe it's colouring your own postcards to send home? Maybe it's a bit of embroidery? You might even manage to take up playing the harmonica like you always wanted to. Time to kill, on a beach, is the time to take the plunge. Go Geocaching hen use it to find secret caches that are hidden all over the world, using a free app. Visit a university library in any country, University and central libraries usually have a storied history too. The one pictured above is in UNAM, Mexico City, and was declared a UNESCO World Heritage site in 2007. The entire building is covered in a mural that pays tribute to Mexico's history.