La Rochelle's harbour has anchored Atlantic commerce since Eleanor of Aquitaine granted port privileges in 1130, and today's recreational fleet departs from the same stone quays that once loaded Cognac barrels bound for London and Amsterdam. The twin medieval towers—Tour de la Chaîne and Tour Saint-Nicolas—still frame the harbour entrance, their limestone facades catching the last westward light as modern catamarans slip past the breakwater into open water. By the eighteenth century La Rochelle handled more New World sugar than any French port except Nantes, a trade that built the arcaded merchant quarter visible from offshore. Sunset cruise La Rochelle tours traverse the Pertuis d'Antioche, the tidal strait separating Île de Ré from the mainland. The channel's swift currents and shifting sandbanks challenged navigators for centuries before the 1988 completion of the three-kilometre bridge that now arcs across the northern horizon. Fort Boyard rises from a shoal twelve nautical miles northwest—Napoleon's engineers spent seventeen years sinking foundations in the 1800s, only to see rifled cannon render stone fortifications obsolete before the oval citadel was finished. The structure appears on every La Rochelle Atlantic sailing itinerary, its two hundred windows forming a distinctive silhouette against the sinking sun. Maxi-catamarans dominate the evening departure schedule from Avenue Michel Crépeau, their twin hulls and trampolines accommodating groups of twenty to thirty passengers. Skippers time the outbound leg to place Fort Boyard on the western bearing as the sun drops toward the Bay of Biscay, then tack south past the Île d'Aix anchorage where Napoleon spent his final days on French soil in July 1815. The Vieux Port's medieval skyline—dominated by the Gothic spire of Saint-Sauveur and the Renaissance belfry of the Hôtel de Ville—glows amber in the hour before dusk, a tableau unchanged since Richelieu's engineers enclosed the Protestant stronghold during the 1627 siege. Most sunset cruise La Rochelle tickets include a westward reach to open Atlantic water, where the coastline compresses into a single limestone stripe and the only sounds are rigging and tide.