Old Web 1.0 occult/weird sites are pretty stimulating if you're interested in spending hours on reading and traversing the labyrinthine navigation (which, nowadays, is in itself quite a rare experience).
kathodos.com - neoplatonic and ancient Buddhist source content, and lots of pissed-off commentary on mainstream Buddhism. The author sounds like a Chinese Schopenhauer impersonator. Insightful, amusingly hateful. Lots of swastikas and no interest in legibility or graphic design whatsoever.
vwsp.eu - site by some hippy guy who claims to have achieved enlightenment at some point - which sounds surprisingly credible, given that his writings are extremely esoteric and introverted in character. Once you get used to the language and come to accept and understand his definitions of "enstasy" and "pilgrimage", you'll find an abstract blueprint for any metaphysical journey. (Kind of like this site as pertaining to metal).
kheper.net - recap of esoteric traditions (gnosticism, interspersed with some vaguely New Agey content which nevertheless manages to be quite objective-oriented, rather than lovey-dovey.
These sites are reminiscent of a time when you actually immersed yourself in what your read over the internet, as opposed to jumping from medium to medium (Facebook, IMs, gay porn) while browsing Wikipedia. In other words: they're all based on a concrete concept which unveils itself over the course of reading; they're not just strips of information ready for syndication over teh interwebs.
Another suggestion:
old ANUS.COM. Going back to 1999 or 2002 will find you quite a lot of gems. Same thing goes for all affiliated sites (e.g. heathen.org, hessian.org, and others, which you can find here:
http://www.corrupt.org/docs/web_development/domains).