Lascaux Cave, France

The paintings are around 17,000 years old. The cave was closed to the public in 1963 to protect them; visitors now see a replica.

The story, as a puzzle

Horses on the walls.
In September 1940, four teenagers (following a dog, so the story goes) found a cave whose walls were covered with painted horses, bulls and deer. Pin it.

Where it is

Lascaux Cave, France · 45.0538, 1.1710

Source: UNESCO World Heritage Centre ↗