The concept of time travel is neat but you don't need science and technology to do so. Going to museums is one great way of going back in time to see things such as old civilizations, national heroes and many others. At the same time, you can interact with friends as you go through various exhibits. Friendly tour guides will also give you everything you need to know and more! If you're interested, there are dozens of museums all over the United States waiting for you to quench your thirst for historical knowledge.Unfortunately, although you won't have to pay for expensive materials to build a time machine, you'll have to spend for costly admission tickets. For that, you should always have museum coupons. This will be your key to various discounts within the establishment.