Will it work at heritage sites like Spiš Castle, Banská Štiavnica, and Bardejov?

The ETravelSim Slovakia eSIM works at all the major UNESCO heritage sites including Spiš Castle, Banská Štiavnica's mining town centre, Bardejov's medieval square, the Levoča cathedral, and the wooden churches of the Carpathian region. Coverage is reliable at the main visitor centres, parking areas, and town squares. Bojnice Castle, Trenčín Castle, and Orava Castle have good signal at the main entrance and viewpoints. Bratislava Castle has full coverage throughout the grounds.