01-small-cave — mentos987
https://freesound.org/people/mentos987/sounds/818888/
License: CC0 1.0. Source: publicly offered Freesound audio preview; first 20 seconds, fades, mono 44100Hz Vorbis conversion.

02-large-cave — nomadas
https://freesound.org/people/nomadas/sounds/609161/
License: CC0 1.0. Source: publicly offered Freesound audio preview; first 20 seconds, fades, mono 44100Hz Vorbis conversion.

03-drops-and-distant-water — aurelien.leveque
https://freesound.org/people/aurelien.leveque/sounds/417631/
License: CC0 1.0. Source: publicly offered Freesound audio preview; first 20 seconds, fades, mono 44100Hz Vorbis conversion.