"Journey to Agartha" is an original composition by Arcoiris Sandoval from her 2018 album Arcoiris Sandoval Sonic Asylum Trio: First Voyage. The evocative title references the mythical underground city of Agartha, and Sandoval crafts a musical landscape that suggests exploration and mystery. Set in E-flat minor at a swinging tempo of around 212 beats per minute, the tune unfolds in a free-form structure without conventional repeated sections, giving the improvisation an open-ended, adventurous quality. Sandoval's piano solo ranges widely across the keyboard, combining dense harmonic clusters with fleet melodic runs to create a sense of journeying through different sonic environments. Her approach balances intellectual rigor with emotional expressiveness, as her improvisations tell a story rather than simply running through changes. The trio format is ideally suited to this kind of exploratory music, as the intimate interaction between piano, bass, and drums allows for spontaneous shifts in dynamics, texture, and mood. The mythological inspiration behind the title reflects Sandoval's broader artistic vision, which extends beyond pure musical abstraction to encompass narrative and imagery. This track exemplifies the creative ambition of the First Voyage album and Sandoval's commitment to composing music that challenges both performers and listeners.