Death Tunnel.
The cover of this one is unpromising and the blurb describes it as pretty much a dreadful old crock of cliches (which it is), but it’s actually very well executed and well worth a look.
Edited:
That and a whole load of subtitled Japanese, Thai and Korean films such as Ring, Ring II, Ju-on ("the Grudge"), the Eye, A tale of two sisters, Dark Water.
Don’t watch the American remakes though - they are dumbed down versions with daft back stories and they signpost every scary bit so that you can see it coming a mile away.