First Saturday in October, museums and galleries stay open all night for free! Nuit Blanche transforms the city into a massive art experience with installations, performances, and special exhibitions from 7pm to 7am.

The best part is discovering spaces that aren't normally open to public — Government buildings, private galleries, unusual venues. Metro runs all night during Nuit Blanche so you can hop between arrondissements easily.

Plan a rough route but stay flexible — Some installations have long queues while others are empty. Bring comfortable shoes and a phone charger. Many cafés stay open late to serve the crowds.

It gets busy but the energy is incredible. Locals participate too so it's not just a tourist event. Check the official program online a week before — Over 100 venues participate.