Book early on the official website and set aside a full day. Versailles is huge; half a day isn't enough.
- Beyond the main palace, visit the gardens, the Trianon palaces and Marie Antoinette's Hamlet (Hameau de la Reine).
- Take the RER C to Versailles Château Rive Gauche, the easiest and cheapest way from Paris.
- Arrive at opening time (9:00) or late in the afternoon. Weekdays, especially in spring and early autumn, are quieter than weekends.
- Download the palace's free app for audio guides.
- Bring comfortable shoes, sunscreen or a hat (the gardens have little shade), plus water and snacks, as the restaurants inside are busy and expensive.
Note: Large bags must be left at the cloakroom. Pack light and allow time for security checks.