depends on what your looking for, I can list some off the top of my head.
League of extraordinary gentleman is really good since it has a vamp, hunter, American spy, jeykl and hyde and the invisible man and it appeals to me but I am 'unique' so it may seem different to others.
Steamboy- post war film based around the power of steam.
The boy who saw the wind- not seen it myself, but apparently very good and its anime.
Van Helsing- [._______.] awesome....
Windaria- its okay, but I haven't seen it outside Japanese subs.
Thelomeris- ummm.....you decide.
War of the Worlds: Goliath- giant metal robots and basically the first transformers.
Mutant chronicles: if my bro likes it, expect gore.
Akira- Bikes, psychics and spies; whats not to love?
half of these are anime, because I love the stuff, and some I have not seen personally but have really good reviews from my friends (unofficial reviews) so you will have to decide for yourself.