Complex sentence: Away from the "falles", there are people frolicking in the streets, the whole city resembling an open-air dance party, except that instead of music there is the incessant (and occasionally deafening) sound of people throwing fireworks around randomly.
Split into simpler sentences: Away from the "falles", there are people frolicking in the streets. The whole city resembling an open-air dance party, except that instead of music there is the incessant (and occasionally deafening) sound of people throwing fireworks around randomly.