Valentré Bridge over the river Lot in Cahors, Lot (France)

The builder was not happy with the slow pace at which they were constructing the bridge. So he made a pact with the devil who promised to expedite the work in exchange for the builder’s soul. But as the contract was finishing and it was time to forfeit his soul as payment, the builder asked the devil to bring water for his workers… using a sieve, which proved impossible. For trying to deceive him, the devil sent an imp to loosen a stone in the central tower every night so the bridge would never be finished.

Legend of Pont Valentré