Launched from Letná Park, they are best viewed from Dvořákovo nábřeží, Pařížská Street, Čechův most, Mánesův most, Štefánikův most and — new this year — Lucerna Rooftop (see below for how to reserve your place). This year’s theme is 30 Years Since the Velvet Revolution; the whole fireworks spectacular will last for close to 11 minutes and will include musical accompaniment.