Skip pricey bus or walking tours on your next trip and instead download these apps, which offer historical insight and cool bits of trivia about areas around the world. Bonus: you won't have to lug around a guidebook.

Walking tours are a great way to learn about an area. Unfortunately, guided tours are often expensive and require that you stick with the group and your guide, with little to no time to do your own exploring. But some apps are looking to replace those guides, giving you the ability to take a tour at your own pace for just a few dollars. Here are eight worth checking out.