Pfahlbau is THE keyword!
Contest #802 Hint
At the confluence of two important rivers in Gaul, one of them going to the Mediterranean Sea.
Contest #801 Hint
Built for a reason and used for only 4 years. Then repurposed and used for shelter!
Contest #800 Hint
The straight lines are definitely what will lead you to the answer.
Contest #797 Hint
An ancient castle from the 13th Century, a fort from the 17th, modern day fish farms and nature reserves and just out of view an international border – lots of things to look for.
Contest #796 Hint
Celebrating a network that ran for about 50 years, it’s located at the southwest end.
Contest #794 Hint
It’s one of three – in different parts of the world. What you see in all three locations makes sense.
Contest #793 Hint
This is an example of the 1939 version. The 1938 version only had 4 rows.
Contest #792 Hint
If anyone was here, they would have been the last people to see it.