Oh yes there are lot of several interesting festival and ceremonies in Peru, among those considered Unesco's Intangible Cultural Heritage of Humanity are

Pilgrimage to the sanctuary of the Lord of Qoyllurit’i
Huaconada, ritual dance of Mito
Oral heritage and cultural manifestations of the Zápara people (shared with Ecuador)

This cultural treasures are not so known. Other like the Scissors dance are more known even among foreigns. This could be a topic for a new thread "Peru beyond Inti Raymi"