graphics that made you say "wow"

[Mummelmann]

Gran Turismo 1, 2 and 3
Half Life
Half-Life 2
Far Cry
Ocarina of Time
Turok: Dinosaur Hunter
Goldeneye N64
Onimusha 2
Thief: The Dark Project
Deus Ex
Battlefield 2
Call of Duty

There are probably more, but its hard to remember all the games from the top of my head.