Naours Underground City – Havernas Castle loop from Saint-Ouen

Naours Underground City – Havernas Castle loop from Saint-Ouen

Moderate

riders

Naours Underground City – Havernas Castle loop from Saint-Ouen

01:28

32.0km

230m

Road cycling

Moderate road ride. Some segments of this route may be unpaved and difficult to ride. The starting point of the route is right next to a parking lot.

Last updated: August 25, 2026

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After 25.3 km for 763 m

Waypoints

Start point

Parking

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3.86 km

Bois Sénat

Forest

15.3 km

Naours Hill towards Flesselles

Highlight (Segment) • Climb

Rare climb worthy of the name in these surroundings

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16.8 km

Murals of the Church and School in Naours

Highlight • Monument

Small frescoes on the bridge in front of the church as well as on the large wall next to the school. There are several nods to the city.

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17.5 km

Naours Underground City

Highlight • Other

At its origin, the underground of Naours was a chalk quarry used mainly for the tidal range of fields. In the 16th century, it was transformed into a refuge, called "muches" (Picard hiding places), for the inhabitants of the village, their goods and their animals until the end of the 17th century.
Fallen into oblivion in the 19th century, the underground city will be rediscovered in 1887, studied from an archaeological point of view and then opened to visitors.

An important occupation during the Thirty Years' War has been attested by archeology1.
This underground city could shelter nearly 2,000 people. Throughout the galleries are the rooms of the different families. Also noticeable are the stables with the troughs, the ventilation chimneys and the smoke chimneys which stood out in those of the houses.
Almost everywhere on the walls there are inscriptions, religious symbols, etc. with dates ranging from the year 1340 to 1792.
It was finally used by British soldiers during the Second World War.

The visit is worth the detour!
Sources:
citesouterrainedenaours.fr
fr.wikipedia.org/wiki/Cit%C3%A9_souterraine_de_Naours

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