Operation n

I strongly believe that for a penetration tester to be effective, he or she must be able to envisage a web application in its entirety as a fundamental pre-requisite.

The Web Site Map template can produce a diagram of your Website structure, showing what is on each page (images, JavaScript, etc.) and how each element connects to all others. Visio allows you to spider an existing Website and creates a map of it for you, including all links and graphics. It even tells you if an image is dead, so it can be handy for error-checking your pages as well. - http://www.sitepoint.com/article/visio-professional-2002

The Microsoft Visio web spider feature can be really powerful. Below are some screenshots:

I am not saying MS Visio is ideal for visualisation of one’s target, I am not even saying that I like it, but I would certainly like to see web spiders for security testing moving in this direction.