Around the Baltic Sea, many Germans are unaware of the somewhat peculiar regulations with regard to sandcastles on the beaches.
Some beaches on the island of Fehmarn and on all the beaches in Sylt, sandcastles are banned. In Sierksdorf and Neustadt sandcastles are allowed as long as they don't exceed four metres in diameter.
That's generous compared to Kellenhusen and Großenbrode shores where the fun ends at three metres. A ruler may be useful at these beaches as all have a 50 cm height restriction.
One lifeguard said: "There is a risk of tripping, and from a certain height it can be dangerous."
There is a serious side to all this. The beaches are sometimes a route for ambulances.