Between the Platier d'Oye nature reserve and the fortified town of Gravelines

Explore the Gravelines Ramparts from the Gîte Bouteille A la Mer
Stay at the Bouteille A la Mer gîte, near Platier d'Oye, and explore the exceptional historical heritage of the Gravelines ramparts, an architectural gem of the Opal Coast.
A thousand-year-old fortified heritage
From your Bouteille A la Mer accommodation, easily reach the ramparts of Gravelines, witnesses to the strategic history of this fortified town. Philippe and Thierry of Alsace were the first to fortify Gravelines in the 12th century, taking advantage of its strategic position at the mouth of the Aa River.
The legacy of Charles V and Vauban
During your visits from the gîte, discover how Charles V rebuilt the old county castle in 1525, creating a citadel ahead of its time. Later, Vauban improved these fortifications, constructing various military buildings that now house the prestigious Museum of Drawing and Original Prints, unique in France.
Remarkable defensive architecture
Explore the ingenious defensive systems from Bouteille A la Mer: the castle entrance through a gate framed by two horseshoe towers, the bomb-proof vaulted tunnel, the powder magazines, and weapons rooms. These architectural highlights make Gravelines an exceptional heritage site on the Opal Coast.
The famous Porte aux Boules
Admire the Dunkirk Gate and its advanced gate adorned with pyramidal balls, a remarkable example of 18th-century defensive art. This unique decorative design illustrates the evolution of fortification techniques, easily accessible during your walks from your cottage.
An exceptionally preserved ensemble
The entire Gravelines fortifications and its water-filled moats still exist and are open to the public. The 1756 relief map, preserved at the Lille Museum of Fine Arts, testifies to the magnificence of these fortifications, which you can explore from Bouteille A la Mer.
Your preferred cultural base
The Bouteille A la Mer cottage offers you the ideal location for exploring this UNESCO heritage site and the architectural treasures of Gravelines. Between the unspoiled nature of the Platier d'Oye and the historical richness of the ramparts, experience an exceptional cultural stay.
Book at the Bouteille A la Mer lodge and explore the Gravelines ramparts, a remarkable military heritage site on the Opal Coast.
Discover the Platier d'Oye Nature Reserve from the Bouteille A la Mer Gîte
Stay at the Bouteille A la Mer gîte and easily explore the magnificent Platier d'Oye Nature Reserve, located between Calais and Gravelines on the Opal Coast.
Guided walks every Tuesday
From your Bouteille A la Mer accommodation, you can join the guided walks organized every Tuesday in this 400-hectare nature reserve in just a few minutes. Whatever the weather, these tours allow you to discover the exceptional richness of this natural space.
Remarkable wildlife to observe
During your outings from the lodge, you can observe the Scottish cows that naturally maintain the reserve's 391 hectares. These animals, resistant to cold and humidity, contribute to the preservation of this unique ecosystem, easily accessible from Bouteille A la Mer.
Exceptional flora and botanical discoveries
Nature guides will introduce you to an exceptional flora with more than 360 species of flowers. Learn to recognize ragwort and its properties, discover the edible plants around you, and build your own "nature market" during these enriching walks accessible from your cottage.
A birdwatching paradise
The reserve is home to over 230 bird species, making Platier d'Oye a prime destination for birdwatchers staying at the Bouteille A la Mer lodge. Each season offers different sightings in this natural sanctuary.
Unique sensory experience
These hikes become true sensory journeys where "from land to sea there is only one step." Discover seaweed and its uses in our daily diet, explore the hidden treasures of this wild coast.
Your preferred exploration base
The Bouteille A la Mer lodge offers you the ideal location for regularly exploring this exceptional nature reserve. Take advantage of the proximity to join the Tuesday walks and discover the secrets of this preserved natural heritage.
Book at the Bouteille A la Mer lodge and enjoy the unique experience of the Platier d'Oye Nature Reserve, right on the doorstep of your accommodation on the Opal Coast.
Discover the Port of Gravelines from your Bouteille A la Mer Gîte, near Platier d'Oye
Discover the Port of Gravelines from your Bouteille A la Mer Gîte, near Platier d'Oye
Stay at the Bouteille A la Mer gîte, ideally located near Platier d'Oye, and explore the Gravelines Marina, the third largest marina on the Opal Coast after Dunkirk and Boulogne-sur-Mer.
Three exceptional pools to explore
The port of Gravelines consists of three remarkable sites totaling 430 berths. The Bassin Vauban, anchored in the heart of Vauban's historic fortifications, has 200 moorings, 25 of which are reserved for visitors. Protected from the winds and located 4 kilometers from the channel entrance, it houses the port offices, the "Au Cap Compas" restaurant, and all essential services.
Modern and accessible facilities
Anse des Espagnols, located near the seaside resort of Petit-Fort-Philippe and its historic lighthouse, offers 78 moorings on three floating pontoons. The Quai des Islandais, in a preserved natural setting, completes the ensemble with 152 moorings and a magnificent view of the Vauban ramparts in the background.
Labels of excellence and international recognition
Gravelines boasts the prestigious "France Station Nautique 4 étoiles" label and the "4 Ancres d'Or" certification from the Yacht Harbour Association. This international recognition attracts many European boaters, particularly from the Netherlands and Belgium, who make Gravelines a popular tourist stopover.
Your gateway to discovery
From the Bouteille A la Mer lodge, near Platier d'Oye, easily explore this exceptional port. Between the unspoiled nature of the nature reserve and the maritime bustle of Gravelines, enjoy a unique stay combining heritage and modernity.
Book at the Bouteille A la Mer lodge and discover the treasures of the port of Gravelines from your accommodation near Platier d'Oye.
Grand Fort Philippe beach and its Calvary
Bottle in the Sea 09/08/2013 11:39
We Tested for You: The Pass'PAarc
Bottle in the Sea 09/08/2017 11:33
The PAarc des Rives de l'Aa, a preparation center for the Games
Bottle in the Sea 28/07/2022 13:14
Gravelines beach
Bottle in the Sea 22/06/2023 17:36
Wake Park Trip'n'Kite at the PAarc de l'Aa
Bottle in the Sea 27/06/2018 10:13
The Trip'n Kite team
Bottle in the Sea 11/10/2015 19:40
Conviviale Trip'n Kite 2016 - view from the sky
Bottle in the Sea 07/06/2016 10:03
Petit-Fort-Philippe beach in Gravelines
Bottle in the Sea 21/07/2015 19:43
Pleasure boating in Gravelines
Bottle in the Sea 25/09/2014 18:47
Gravelines marina tower
Bottle in the Sea 22/09/2018 05:28
The Chtri'man at the PAarc de l'Aa
Bottle in the Sea 04/07/2024 16:45
Gravelines - fortified area of Hauts-de-France
Bottle in the Sea 25/02/2022 10:26
The people of the Hauts at Platier d'Oye
Bottle in the Sea 20/12/2017 18:11
Dunkirk beaches Les Escardines.
Bottle in the Sea 20/01/2025 20:18
Regional report: heading to the village of Wimereux
Bottle in the Sea 20/01/2014 16:19
Wissant - Hauts-de-France Region - Stéphane Bern - The French People's Favorite Village
Bottle in the Sea 09/09/2019 07:06
Audresselles "Opal pearl"
Bottle in the Sea 15/09/2018 12:13
Saint Omer Region - Opal Coast - 100 Places to See - Documentary
Bottle in the Sea 19/07/2020 15:00
Dunkirk / Dunkerque by drone 4K [] France
Bottle in the Sea 21/05/2022 12:29
Boulonnais - Opal Coast - The 100 places you must see - Documentary
Bottle in the Sea 21/07/2020 15:00
Discovery: the Opal Coast, the Wild North
Bottle in the Sea 24/06/2022 13:41
The ramparts of Gravelines along the water
Bottle in the Sea 12/07/2021 09:54
Strongpoint Luise - Grand Fort Philippe
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inauguration of the Petit Fort Philippe lighthouse
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Gravelines at 360°
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GRAVELINES - The Petit-Fort-Philippe Lighthouse
Bottle in the Sea 30/06/2014 10:54
GRAVELINES - City Fortified by Vauban
Bottle in the Sea 27/06/2014 17:13
Sea House in Grand-Fort-Philippe - 3' - 2011
Bottle in the Sea 28/04/2013 11:29
City of Gravelines
Bottle in the Sea 17/10/2018 16:55
The incredible reconstruction of a Louis XIV ship - Weather forecast
Bottle in the Sea 17/04/2019 14:19
Petit-Fort-Philippe beach in Gravelines
Bottle in the Sea 21/07/2015 19:43
the Platier d'Oye
Bottle in the Sea 21/05/2023 11:26
Grand'Place (Wéo) Broadcast June 2016 Platier d'Oye
Bottle in the Sea 24/06/2016 15:28
Dunkirk beaches Les Escardines.
Bottle in the Sea 20/01/2025 20:18
Grand Fort Philippe – France - GOPRO 12 4K
Bottle in the Sea 12/07/2024 17:21
GRAND FORT PHILIPPE MARKT 4K
Bottle in the Sea 21/07/2024 11:51
The people of the Hauts at Platier d'Oye
Bottle in the Sea 20/12/2017 18:11
Platier d'Oye (Platier d'Oye National Nature Reserve) – GOPRO 12 4K
Bottle in the Sea 10/07/2024 20:40
GRAVELINES GRAND FORT PHILIPPE LE PORT August 12, 2020
Bottle in the Sea 13/08/2020 06:58
Grand-Fort-Philippe, walking the pier. Opal Coast
Bottle in the Sea 27/04/2023 16:49
The Oye reef (Pas de Calais)
Bottle in the Sea 04/06/2012 17:19
Grand Fort Philippe beach and its Calvary
Bottle in the Sea 09/08/2013 11:39
Kitesurfing in Gravelines on March 15, 2025
Bottle in the Sea 16/03/2025 16:16








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Platier d'Oye (Platier d'Oye National Nature Reserve) – GOPRO 12 4K
Bottle in the Sea 10/07/2024 20:40