There is one, for instance, where you cannot wield weapons as you come to the gates, or else you will be unable to explore it safely, if at all, for the life of the character.

This aspect of the area has NO warning, and nothing about it even remotely hints that this may present a problem.

This is, as far as I can think offhand at 6 am, above and beyond the worse perpetrator of such things. In general, a very sharp attention to detail will see you through.

I strongly urge you seek out other people who like to explore as well, and go through areas together.