Did you know? The department of 91 hides a genuine wealth of heritage, often more understated than the big tourist hotspots of Île-de-France. Here in Essonne, the landscapes change quickly. We move from lively towns to rural pockets, from green valleys to agricultural plateaus, from old streets to more contemporary architecture. This diversity gives the department a distinctive identity: at once part of Île-de-France, historic, natural, and sometimes almost pastoral.
We invite you to set out in search of the hidden heritage of Essonne: places we barely notice, local stories you uncover by digging a little, architectural details, traces of the past, or landscapes that tell a different story about the territory.
The department, in particular, preserves memories of ancient villages, manors, former seats of power, agricultural traditions, walking paths, and sometimes astonishing curiosities. For fans of walks, little-known heritage, and Francilian secrets, Essonne has plenty to spark curiosity. The surprising treasures of 91 are just below.
This building in the Paris region is the last surviving remnant of the world's first airfield.
In Viry-Châtillon, in the Essonne department, the Port-Aviation Officers' Mess hides an astonishing tale: the story of the world's first organized airfield, inaugurated in 1909, where aviation pioneers let their quirky flying machines roar. [Read more]
This temple is one of the last remnants of a castle that no longer exists in the Île-de-France region, and it’s open for visits!
In Orsay, Essonne, there's a charming neoclassical temple tucked away in a quiet corner. One of the few remaining remnants of the once-imposing Orsay Castle, which no longer exists today, it is open to visitors on a seasonal basis. Here’s what you need to know about this little-known gem of the Île-de-France heritage. [Read more]
In Essonne, this crypt, now serving as a cultural center, stands as the last remaining remnant of a former monastery.
In the heart of Essonne, a modest exhibition space conceals a history far older than one might suspect. This crypt, now transformed into a cultural venue, stands as one of the few remaining traces of a vast medieval monastery that once covered a large part of the city. [Read more]
This medieval tower, offering a breathtaking panoramic view of Essonne, was once used to measure the speed of light.
Perched atop a 30-meter-high hill, the Montlhéry Tower offers a breathtaking panoramic view of Essonne and the Île-de-France region. This historic medieval relic, officially listed as a Monument Historique, once served as a laboratory for some of the greatest scientists of the 19th century. Whether you're interested in its history, planning a visit, or just taking a leisurely walk, here's everything you need to know. [Read more]
In the Paris region, this church stands out with its striking retro-futuristic architectural style.
In Massy (Essonne), a suburb of Paris, the Lutheran Saint-Marc Church catches the eye with its striking retro-futuristic design—an uncommon sight in Île-de-France. Built in the latter half of the 20th century, it stands out from traditional places of worship with its bold lines and modernist aesthetic. [Read more]
In Essonne, remnants of a mill over 800 years old
In Boussy-Saint-Antoine, in Essonne, the remnants of the Rochopt mill serve as a testament to over 800 years of history. This medieval mill, modest yet vital to the Île-de-France heritage, stands as a quiet witness to centuries gone by. [Read more]
This former hunting lodge in the Île-de-France region conceals a stunning garden of monumental sculptures.
In Essonne, south of Paris, tucked away in the woods of Sénart Forest, a former royal hunting lodge hides an unexpected garden of monumental sculptures. Welcome to the Sénart Partridge Farm, an extraordinary place where history and contemporary art intertwine along winding paths. [Read more]
The mystery of the Pierres Frittes de Brunoy, mysterious menhirs in Essonne (91)
In the heart of Brunoy, in Essonne, stand the mysterious Pierres Frittes, ancient Neolithic menhirs whose origins still fascinate. Between legend, history, and a stroll along the Yerres, discover this little-known site, open to the public, a true prehistoric treasure in the Paris region. [Read more]
Unusual: In Île-de-France, this leaning tower is nicknamed the Pisa of the North (91).
Did you know that in the Île-de-France region, more specifically in Essonne, there is a tower whose tilt is reminiscent of the Leaning Tower of Pisa? Here is the story of the Church of Saint-Martin d'Étampes and its astonishing leaning bell tower. [Read more]
Are you familiar with the Lady of the Lake, that stunning climbing sculpture in the Paris region?
In Évry-Courcouronnes, a strange sculpture seems to rise from the water. It’s known as the Lady of the Lake, and it marks France’s very first artificial climbing structure. [Read more]
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