El Escorial Photos
The trip can be done in public transport in
about an hour from Madrid (an hour and a half or two all told
including the walking). And if you've made it this far (to Madrid),
you have to go all the way. It'd be a shame otherwise.
See: El Escorial by Jorge Tutor
Monasterio de El Escorial on Wikimedia
is seeking English teachers for in-company classes.