Best attractions and places to see around Millemont include historical sites, natural landscapes, and cultural landmarks. The region, situated in the Yvelines, provides opportunities to explore its heritage and natural beauty. Visitors can discover a variety of sites, from ancient structures to serene ponds within the Rambouillet forest. Millemont is a destination where several hidden gems are waiting to be explored.
Last updated: May 21, 2026
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Built at the end of the 12th century by the Counts of Montfort and listed as a Historic Monument since 1889, the Houdan Tower was used to watch for enemies and defend the territory. The Keep consists of a 15 m diameter and 21 m high tower, flanked by four turrets of the same height located at the four cardinal points. From the 16th century until the French Revolution, the Keep served as a prison, and executions took place at the foot of the Tower. The first water reservoir was installed in the tower in 1880. The second, built in 1952, is still visible. Tours are available on certain days.
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This small table is in the oldest large circle. A large table is located in the new small star. An old table, called the "débotter" table, on which the king sat so that his large hunting boots could be put on, it also served as a snack table and also, and perhaps especially by climbing onto it by a circular bench, as an observatory in the center of a star. The small table of Beynes seems the oldest, it is a large circular block, split in the middle and supported by four terminals. The large table is more ornate with the inscription "remade in 1783", and its top bears the indication of the roads, also serving as an orientation table. This assignment is unique, moreover the inscription "Route d'Auteuil" does not correspond to the star where it is, but to the Grand Rond. It is reasonable to think that the table from Ste Appoline (Plaisir) was brought there first, while the one from Beynes was being remade, then the tablets were reversed, and this is how the large table is in the small star and gives the orientations of the Grand Rond.
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Many houses of worship in France bear the title “Notre-Dame” (in German “Our Lady”) and are therefore dedicated to the Blessed Mother Mary. Sometimes the specific patronage is made clear by an additional name, such as “Assumption of Mary” or “Immaculate Conception”. Here in Les Mesnuls, the church or chapel bears the suffix "Notre-Dame du Chêne", i.e. "to the oak". This means that it is not an event in the life of the Mother of God that is referred to in the patronage, but rather a tree that gave the immediate surroundings of the church a formative shape. In fact, you can see a tree on the left and right of the building.
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Monument dating from the end of the 12th century
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Here at 36 rue de l'église, an old house different from the neighboring buildings. This is the "Tric" villa acquired in 1915 by Henri Désiré Landru to commit his macabre crimes. Within these walls, 7 women were murdered between 1915 and 1919 among the 11 officially recorded victims. The choice of the Gambais villa was motivated by its isolation, as it was 300 m from the nearest house (this is obviously no longer the case now), and by its outbuildings and the basement. Here were found supposedly human remains in a heap of ashes discovered in a shed, in the fireplace, and in the stove; one will also find clasps, pins, pieces of corset, partly burnt buttons. In all, the police found 4.176 kg of charred bone debris, including 1.5 kg undoubtedly coming from human bodies, as well as 47 teeth or tooth fragments. The medical examiner will announce to the press that these bones correspond to three heads, five feet and six hands. Having become a famous place on the occasion of the resounding trial, Villa Tric de Gambais was looted by the crowd, then sold to a restorer who renamed it "Au Grillon du Foyer" and converted part of the building into a museum. It even seems that the "Landru" rib steak was served there, grilled over a wood fire... The restaurant closed its doors in 1940 and the house was then sold to private individuals. The famous villa also gave rise to a series of postcards. Somewhat forgotten after several decades, the house came back into the news in 2018 when it was put up for sale with an announcement very discreetly stating "very beautiful house steeped in history"... The cook of the villa after a succession of transactions ended up being bought by Laurent Ruquier. Passionate about the character, he wrote a play on the subject, in 2005, with Régis Laspalès in the main role. No sign, no sign comes to announce the history of this house which undoubtedly wishes to fall back into oblivion.
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The Tower (commonly called "The Dungeon"), built in the 12th century under the reign of the Counts of Montfort, and classified as a Historic Monument since 1840, had the function of watching out for enemies and defending the territory. But in reality, it mainly had a dissuasive role since it was reputed to be impregnable. Built on the site of an old Merovingian necropolis, it originally consisted of an enclosure and a main tower. The enclosure, which has now disappeared, had a circular turret intended for the defense of the gate. The access door, located 4 meters from the ground then raised in the 15th century to 6 meters, was the only access to the large room on the 1st floor reserved for the military chief. It was accessed via a drawbridge.
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Located at an altitude of 154 meters1, the pond covers an area of 0.8 hectares. The “Ponts-Quentin stream” flows into the Rompu pond — coming from the Holland ponds located about 1 km upstream to the east — and comes out to flow, about ten kilometers further to the west, in the Vesgre, having previously changed its name twice: first under the name of “Etang-Neuf stream” then under that of “Grapelin”. The Ponts-Quentin stream passes under departmental road 138 before flowing into the pond, which justifies the undulation of the road and its bend. The pond is part of the Rambouillet national forest, a private state domain. As such, its management is ensured by the National Forestry Office (ONF). Wikipedia
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Located in the Rambouillet forest in the Yvelines, the Rompu pond is a very charming little body of water. As the seasons go by, the reflections in the water constitute veritable open-air frescoes. No traditional museum but a reward for adventurous hikers!
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The region offers beautiful natural spots, such as Rompu Pond, located within the Rambouillet forest. It's known for its serene reflections and tranquil setting, perfect for enjoying nature.
Yes, Millemont is rich in history. You can visit The Donjon of Houdan, a 12th-century castle and monument that served as a watchtower and later a prison. Another significant historical site is the Notre-Dame du Chêne Chapel, an important pilgrimage site with a connection to an ancient oak tree.
The area around Millemont is excellent for outdoor activities. You can find numerous routes for hiking, road cycling, and general cycling. For example, there are moderate hiking routes like the 'Four Pillars Forest – Étang de la Pimardière loop' or challenging road cycling routes such as the 'Behoust Castle – Côte des 17 Tournants loop'. You can find more details on these activities in the dedicated guides for hiking, road cycling, and cycling around Millemont.
Absolutely. Rompu Pond is a great spot for families to enjoy the forest and water. The Notre-Dame du Chêne Chapel is also considered family-friendly, offering a cultural experience. Additionally, the Small round table, an old hunting table that served as an observatory, can be an interesting stop for all ages.
The Notre-Dame du Chêne Chapel is a religious building and an important pilgrimage site, dedicated to the Virgin Mary. Its name, 'Our Lady of the Oak,' refers to an ancient oak tree where an image of the Virgin Mary was found in the 16th century, making it a place of deep historical and spiritual significance.
Yes, there are easy walking trails available. For instance, the 'Étang de la Pimardière loop from Béhoust' is an easy 2.2 km hiking route. You can explore more options in the hiking guide for Millemont.
The Donjon of Houdan is a monument dating from the end of the 12th century, built by the Counts of Montfort. It was primarily a watchtower for defense and had a reputation for being impregnable. From the 16th century until the French Revolution, it served as a prison. Today, it is classified as a Historic Monument.
For those interested in unique history, the Villa Landru in Gambais holds a dark past. This house was acquired by Henri Désiré Landru in 1915 and was the site of several macabre crimes. While it's now a private residence, its history is a notable, albeit somber, part of the region's past.
Visitors appreciate the variety of experiences, from the tranquil natural beauty of Rompu Pond to the rich historical depth of sites like The Donjon of Houdan and Notre-Dame du Chêne Chapel. The blend of natural landscapes and cultural landmarks, along with opportunities for outdoor activities, makes the region appealing.
Yes, many of the hiking routes around Millemont are circular. For example, the 'Étang de la Pimardière loop from Garancières' is a moderate 8.9 km circular route. You can explore more circular options in the hiking guide for the area.
The Small round table is an ancient stone table, also known as the 'débotter' table. Historically, it was a place where kings would sit to have their hunting boots put on, served as a snack table, and functioned as an observatory in the center of a star-shaped clearing, offering unique views.


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