☔ In overcast/rainy weather
Indoor heritage and protected spaces
Naples is full of exceptional indoor spaces perfect for rainy days.
Must-see sites:
🏛️ National Archaeological Museum (2-3h, 15€, morning optimal)
⛪ Duomo and San Gennaro treasure (1h, 3€, avoid mass)
🎭 San Carlo Theater and guided tour (1h, 9€, book online)
🏰 Egg Castle underground galleries (1-2h, free)
🍕 Spaccanapoli and its baroque churches (3-4h, free)
🛍️ Umberto I Gallery covered shopping (1h, free)
⚰️ San Gennaro Catacombs (1h30, 9€, guided tour)
🎨 Royal Palace historic apartments (2h, 6€)
Practical tip: Book online to avoid queues, several sites offer skip-the-line
Additional tip: 3-day Artecard (32€) is cost-effective for 3+ museums with transport included