Portsmouth is a port city and naval base on England’s south coast, mostly spread across Portsea Island. It’s known for its maritime heritage and Portsmouth Historic Dockyard. The dockyard is home to the interactive National Museum of the Royal Navy, the wooden warship HMS Victory, where Nelson died in the Battle of Trafalgar, and HMS Warrior 1860.

The Isles of Scilly are an archipelago off the Cornish coast, in southwest England. The islands are covered in heathland, and fringed by sandy beaches such as Great Bay on St. Martin’s. On Tresco, one of the 5 inhabited islands, Tresco Abbey Garden is home to subtropical plants and also the Valhalla Museum, displaying shipwrecked figureheads. The tower of 17th-century Cromwell’s Castle stands at the north of Tresco.

Brest is a port city in Brittany, in northwestern France, bisected by the Penfeld river. It’s known for its rich maritime history and naval base. At the mouth of the Penfeld, overlooking the harbor, is the National Navy Museum, housed in the medieval Château de Brest. Across the river stands Tour Tanguy, a medieval tower. To the northeast are the National Botanical Conservatory and the Océanopolis aquarium.

Saint Peter Port is the capital of Guernsey as well as the main port. The population in 2019 was 18,958. In Guernésiais and in French, historically the official language of Guernsey, the name of the town and its surrounding parish is St Pierre Port. The "port" distinguishes this parish from Saint Pierre Du Bois.

Honfleur is a city in the department of Calvados, in northern France's Normandy region. It's on the estuary where the Seine river meets the English Channel. The Vieux-Bassin (old harbor), lined with 16th- to 18th-century townhouses, has been a subject for artists including Claude Monet and native son Eugène Boudin. Nearby is 15th-century St. Catherine's Church, a vaulted timber structure erected by shipbuilders.

Dover is a coastal town in England’s southeastern county of Kent. It’s a major port for ferries to Calais, in France. Built to repel invasions from across the English Channel, medieval Dover Castle overlooks the town and houses the extensive Secret Wartime Tunnels.