Originally Posted by MyWorld

Turn Turn Turn- the Byrds
All You Need is Love, Strawberry Fields, ha lots of Beatles songs
I can see for miles and other stuff by the Who
Goin to California -Led Zeppelin
Purple Haze- Jimi Hendrix
People are Strange -the Doors
Tales of Brave Ulysses, Sunshine of your love- Cream
Good Vibrations -the Beach Boys
Imagine -John Lennon
Casey Jones- Grateful Dead
Do you believe in magic- the Lovin Spoonful
White Rabbit -Jefferson Airplane -this song is about Alice in Wonderland, one of the most well known completely psychedelic movies

Sorry, I know you said one. I'm not sure if The Sound of Silence is psychedelia or not but if it is I add it.