1. Longues-sur-Mer is a small village located in the Calvados department of Normandy, France. It is best known for its historic German artillery battery, which played a significant role in the D-Day invasion of World War II. There are four large guns protected by reinforced concrete casemates, which were captured by British forces on June 7, 1944. Visitors can tour the site and learn more about its role in the war. Nearby Bayeux is a beautiful medieval town known for its stunning Gothic cathedral, impressive tapestry, and picturesque streets.

2. The artillery battery site is open every day from April to September, and from October to March on weekends and holidays (except for January). The hours vary depending on the season, so it is best to check the website or call ahead for specific hours. The phone number for the site is +33 2 31 22 45 90.

3. There is an admission fee to visit the Longues-sur-Mer artillery battery site, which is €7.50 for adults and €4.50 for children aged 7-17. Children under 7 are free. Visitors can reach Longues-sur-Mer by car or by taking the train to Bayeux and then driving or taking a bus to the site. There is free parking available on-site.