The castle has a retail/gift / antique shop, a restaurant, tavern and the Cave Hill Visitor Centre, it is a very popular venue for weddings, conferences and events. As mentioned before it is free to visit the castle and grounds, inside are several floors which are accessible to the public. To get there from the city use your Visitor Pass or buy a day rover ticket then catch a Metro services 1A, 1B, 1C, 1D, 1E, 1F, 1G a from city centre and ask for the Belfast Castle stop, you then have to walk along Innisfayle Park to the main entrance. You can find out more by visiting the castle and the times for various elements within it on their website, click the following link which will open in a new window: Belfast Castle