What relaxing/etheral music like Happy's Happy Place song from Happy Gilmore or Sky and Sea from Mario Sunshine do you know?

Uncharted Worlds (galaxy map music) from the Mass Effect soundtrack

Stickerbrush Symphony from Donkey Kong Country 2

Since you mentioned a video game track, I'll say Epona's Song from LoZ OoT

Erana's Peace - Heroes Quest (Quest for Glory)

Porcelain - Moby

I don't know those two songs, but when I think relaxing and ethereal, I think Banco de Gaia.