This is almost the same as What on Earth? It's hard to say which is better because they're almost the same thing. I guess the difference is in who gives you the information -- What on Earth's experts are better in my opinion, but it's a toss up. This is more historical, while WOE is more about modern day aerial images, while this is about old structures. That's where the differences stop, but this may not be a bad thing (I like the format of these shows). Hope they keep it on TV and explore more places I don't know about.