Here are some of my favourite of NASA’s large images in a zoomable format.
Hubble Ultra Deep Field
Martian landscape

Apollo 11 lander

Dark Side of the Moon
Horse’s Head Nebula


Time Team Does Discworld – from C4 forums.

Time Team Does Ryhope – from C4 forums.


Dino Directory – still my favourite thing I ever did online.
Data Locator – my second-favourite thing I ever did online (sadly offline)
CMS Report 2001 Content Management Systems review for TechWatch (JISC) and a nice review of it some years later.
Leeds UTD 1999
Knaresborough 1999
3dVR Voxel Man 1998