You may find that one of the best ways to experience a new city would be to go on a walking tour. There are many free walking tours in major cities especially in Europe that you can experience. These are generally organized tours by foot that take you through the nooks and crooks of a city that most tours don't include in the itinerary. It's a great way to have hours of fun with those that are part of this guided tour. Certain walking guides are paid but there are many tours that rely just on tips.

However, should you decide to explore the world by yourself, you could decide to download local tour apps that provide navigations through major attractions within a city. For instance, Rick Steeve's audio walking tour guides is a great addition to your suite of apps to install when exploring Europe. It includes a wide range of guides on attractions across multiple cities and gives you self-guided walking tours for you to enjoy at your own pace. Some of these apps have the option of using them offline allowing you to not use excessive mobile data when you're on the move.

Meanwhile, several other walking tour apps are designed to turn your smartphone into a walking tour guide which works great especially if the city is completely alien to you. You could also find navigation apps such as Google Maps very useful to find local cafés or restaurants nearby. Depending on which city you decide to explore, you could download specific tour guide apps for free and have adventures in a very cost-effective way.