The last thing you listened to was.....

[Zappathustra]

Agree!!.
Fantastic and excellent work/opera rock!; a pillar of the Latin American progressive scene; at the same level as for example:
- Materia Gris - Oh Perra Vida de Beto (1972).
- Vox Dei - La Biblia (1971)
- Los Jaivas - Alturas de Macchu Picchu (1981)

Regards!!.

Thanks for the suggestion of Vox Dei, this is very good. I still feel that Arco Iris is on another level . One of the great bands of 70's rock music in my opinion.