Citadelle de Lille 
Description
The fortress of the city, at the lowest point it's hidden from all views by the trees that surround it. The centre of the Citadel is still in use as an army site and can only be visited on a guided tour (French only, must be booked at the Tourist Information Centre at least 24 hours in advance and only on presentation of passport or national ID card.) However, the rest of the site, and the former moat, are open as a spacious city part and a nice place to wander round in the sun.
Charge
Free
Getting There
Latitude: 50.640507; Longitude: 3.046995
What3Words: devours.cool.scouted
