There are a lot of posts about going back in time. How about going back in time for a day to an era gone by.

Spend an entire day walking the streets. Going through stores. Having lunch at an old restaurant. Watching the people and listening to what they are talking about. Maybe going to a car dealership and test driving your favorite classic car when it was bran new. Would you consider that a fun day? You would be the same age you are now and provided with the appropriate attire of the day. You can't change history and this is just for a day. You would be back home that evening.