First, a warning. This post contains pictures of spiders. Big spiders. If this worries you, perhaps consider reading something else - I suggest my previous post: Borneo - No Spiders.
We stayed at two very different parks in Borneo. Danum Valley, one of the oldest rain forests in the world, is famous for its orangutan population. Mulu National Park is more mountainous, with famous caves.
Danum Valley in particular is very wild and we needed a guide anytime we left the lodge. In addition to leeches, there were all manner of other creepy-crawlies (not to mention larger animals) that seemed determined to feast on our flesh. Mulu was more built up but still provided plenty of interesting insect life.
It would be wrong to suggest that either park was covered in spiders, we saw none around either lodge. But there were certainly big spiders to be found without looking very hard out in the forests or caves.
These are the best photos I took with my cell phone. The biggest spiders came out during the night so getting well lit photos was a bit of a problem.