If you haven't seen Google Earth you owe it to yourself to download and install it. It takes about a minute. I'll describe it briefly but words don't do it justice.
I'm not talking about maps.google.com - Google Earth is a separate program, not a web page. With it you can fly around a world made up of actual satellite photographs - yes, the entire earth. You can explore anywhere you like - the Andes, Washington DC, Damascus, the North Pole. Major metropolitan areas like New York and Beijing tend to have higher resolution. It includes the option of superimposing map and business information.
A lot of computer geeks have come to the conclusion that all great uses of the Internet, all super apps, have already been invented. Leave it to Google to prove them wrong.
Oh, yeah, I forgot to mention, it's free.