Ads from Google have logarithms that take into account your location, via IP addresses.
There's a better way to check the type of ads served, as seen through your target audience eyes, who might not be living in the same region as you.
Just use a web browser renderer.
For example, I've loaded a URL to netrenderer. It returned me the screenshot, shown below:
The page was featuring an artbook review. And the artbook was about Beowulf, a computer generated movie. The ads on the sidebar featured ads selling 3D products and services. The ads on the top horizontal strip featured art products and services.
Relevant? Yes.
Here's a list of browser renderers you can use:
Web rendering services has more websites that feature browser renderers. If you feel you need more, check them out. Otherwise, the 4 in the list above are more than sufficient for checking the ads.