Just hours ago, I came across something very interesting. It's basically an interactive globe that shows what the Earth's continents were like throughout the ages, going from the present day up to as far back as 750 million years ago.
Ancient Earth Globe(This particular link shows the present day Earth, but you can adjust the settings to look at the Earth in any time period you're interested in.)
I haven't yet had a chance to really explore it, but according to
this article where I found out about it, you can even enter addresses to find out what certain specific locations were like in various prehistoric times.