There are at least two bands called Bajo Tierra:
1.- A Colombian Rock band. and
2.- A Venezuelan Grunge-Rock band.

1.-
“Bajotierra” is a colombian rock band formed by Jaime Andrés Pulgarín, Lucas Guingue, and Alejandro Duque, from Medellin, in 1989. In the earlies days the band played in the Clubs and many places on the city, and as the band played in one underground level on the city they called the band “Bajo Tierra” in English is Underground.