Perhaps the single most famous work of interlaced design, aka Celtic knotwork (although the Celts are by no means the only folks who employ it -- cultures as far afield as Maori and Moors made fabulous use of it, particularly in their architecture!) is the Book of Kells, an illuminated liturgical manuscript housed at Trinity College, Dublin, Ireland.
I have had the pleasure of seeing this magnificent work in person, and I felt like there could never be enough time in the world to study and appreciate the swirling, scrolling illustrations.
Perhaps the folks at Trinity decided that might be the case for most people, so they have very awesomely made The Book of Kells available online, for free, for anyone with sufficient computer / bandwidth. If you want to recreate the in-person viewing experience, drape a blanket over yourself, your computer, and a docent whose job is to intervene if you try to touch anything.