Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

A musical instrument played by the sea.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.