Music by Kevin MacLeod. Released into the public domain (CC Zero). Download link: http://freepd.com/Atmosphere/Slow%20Ticking%20Clock

MacLeod's description:

Genre: Horror
Length: 3:25
Instruments: Misc

Metallic ringing noises make you feel as though you are trapped in the inner workings of an enormous grandfather clock, the chimes and gears reverberating around your brain, providing a feeling of being disoriented and tortured. Could also be used to depict a strange alien land full of metal and machines. 037
ISRC: US-UAN-11-00780
Dark, Eerie, Intense, Unnerving 2011