A few moments of impressionistic beauty...

Here's a list of little known but quite beautiful impressionistic pieces:

Bridge - Enter Spring

Casella - Notte di maggio (especially around 4 minutes in)

Castelnuovo-Tedesco - Cipressi

Griffes - The Pleasuredome of Kubla Kahn

Howells - Sine Nomine

Koechlin - Pretty much anything, but Berceuse phoque is excellent

Moeran - Lonely Waters

Schreker - Prelude to Die Gezeichneten

Wellesz - Vorfrühling

Zemlinsky - Most of the Lyrische Symphonie and Die Zwerg