It's called a singing road, and the fifth of its kind in the world was built west of Tijeras.
Transportation officials suggested Old Route 66 for the experiment in hopes it will bring more tourists to the Land of Enchantment.
To experience the "singing road" travel east on highway 333 (Rt. 66) from Canuel, NM. Just past "deadmans curve" set your cruise control to 45mph and enjoy the tune.
The geocache is located near the start of the music. Park at the suggested parking and walk towards the start. Hidden at the obvious place in plain site. The cars driving past are very entertaining.