You don’t need an invitation to Prince Harry and Meghan Markle’s wedding on May 19 to enjoy the ancient castle where they plan to marry, or to attend services at the Gothic chapel where they will say their vows.

The wedding is to take place in Windsor, west of London, about 40 minutes to an hour by train. You can figure out what works best for your schedule, including whether you want to travel by bus, at Tfl.gov.uk/plan-a-journey. Alternatively, you can drive (it’s about 50 minutes to an hour by car) though you’ll have to park in town as there’s no visitor parking at the castle. Tour companies also offer trips to Windsor from London (see below).

The ceremony will be held in St. George’s Chapel on the grounds of Windsor Castle — built more than 900 years ago, it is the oldest occupied castle in the world — and the place where the queen spends most of her weekends.

Services at the chapel are free and open to anyone. If, however, you want to visit the chapel ( and not attend services), you must buy a ticket at the Windsor Castle admissions office (2018 prices are £21.20 for adults, or about $28.30; £19.30 for students with ID and those over 60; £12:30 for disabled visitors and children under 17; free for children under 5; £54.70 for a family of two adults and three children under 17; prices are reduced when the State Apartments are closed). (Note that you cannot take photographs inside St. George’s Chapel.) Also keep in mind that Windsor is a working castle, so expect airport-style security. You can view the rules and hours at Royalcollection.org.uk/visit/windsorcastle.