Tourists are not allowed to take pebbles from popular beaches in Greece - or wear high heels at some of its historic monuments.
Visitors could face fines of up to £771 should they commit either of these misdemeanours. It is because the country has introduced, over the years, strict laws to protect its landscape and heritage.
Greeks believe heels can disrupt or damage the old stones at its multiple ancient sites so high heels are banned at these attractions.
The law surrounding stones at the seaside pertains to several beaches, including Lalaria Beach in Skiathos. Anyone who does dare take pebbles away from the sand here could be fined up to £771, though most likely a lesser sum.
It's British holiday season as scores of families dash to airports across the country for the likes of Greece, Spain and Italy, where there are also bizarre rules. The one in Greece concerning historical monuments, such as the Acropolis, Odeon of Herodes Atticus in Athens and the Epidaurus Theatre in the Peloponnese region, was introduced by lawmakers in 2009, according to Parkdean Resorts.
In Spain, meanwhile, if anyone walks around Barcelona in a swimsuit, bikini, swimming trunks or even bare-chested, they can be fined anywhere between £86 to £171.
Last month, authorities in Majorca also unrolled new fines in a bid to crackdown on "undesirable" behaviour on their most popular beaches.
And if visitors want to build sandcastles on Levante beach in Benidorm, they need to get a permit first or they could be fined up to £129. If they also smoke, sleep or use shampoo or body wash on the beach, they could be fined hundreds of pounds more.
Laws are the least of Brits' concerns across Europe at the moment, though, as weather maps show temperatures are set to reach dangerous levels across most of the continent this week. The "insidious" heatwave has already led to at least three deaths in Italy alone.
The mercury set to hit a sizzling 45C in some regions of Greece, forecasters say. The heatwave is set to start on Wednesday and is due to last ten days with an average of 42-43C and a peak of up to 45C on Friday.
