Megaliths.org and Newearth Youtube channel
This website gives you a really good idea about lost history and what remains to tell us about it. We have a lost recent past as well as only being able to rely somewhat on myths and legends as to before that.
The megaliths website is not the most modern or stylish but does contain a llarge number of very interesting images. You can also navigate to the videos by Sylvie Ivanova on youtube from there