Family trees

I know that a lot of people know how bad the marriages between European royalty in the olden times were. People would constantly be marrying their cousins and relatives and that would be the norm. Still, it's hard to actually see what is going on without a picture:

What the?!?! The tree converged on itself? This is not how a family "tree" should look! And you wonder why the kings always made stupid decisions... Hopefully our own family trees don't look like this.

It's strange to think about your ancestors and all but it might be fun to trace where all your heritage started. Granted most people do not have the fame to have their family tree be so easily found like the European royalty, but I'm sure you can still trace back at least 3 generations if you try hard enough.