A very nice introduction, and it is also available in Spanish. A fair introduction and some very good tips to keep in mind when creating pages. It is a bit dated though with respect to current HTML practice. Devry's 'Learning HTML' Resource list. Quite a few original primers, articles and tutorials on many HTML topics.
Main page is very tables-intensive and can take a while to load.
Kevin Werbach's 'Barebones Guide to HTML'. Very good site. Good overall reference on HTML containing references on HTML, style sheets, and articles. Very good site. Very HTML 3.0 centric.