You could be slapped with a hefty fine if you're not too careful while abroad.
In fact, holidaymakers can find themselves paying up to $1million (£724,000) for behaving badly on holiday.
Tourist hotpots which are sick of rude travellers are now introducing new "good behaviour" pledges to stop anti-social visitors.
Some of the behaviours deemed to be bad include speaking too loudly, picking up flowers and travelling off the road.
Iceland is one of the destinations to introduce the signed pledges, with the country struggling from over-tourism before Covid-19.
The country has introduced a "sustainability and responsibility" pledge which all visitors have to sign.
It includes a ban on tourists travelling off-road, an offence you can face local fines for, as well as walking to off-limit areas for snaps.
Visit Iceland's Sigríður Dögg Guðmundsdóttir told CNN Travel: "As we grow up in (Iceland), we learn how to be safe.
"But it's not a given that a visitor knows exactly how to behave in our wilderness."
It was first launched in 2017, although other countries have since followed.
In Finland, a ban means "loud talking" in the form of poetry is not allowed.
Its pledge adds: "I shall also respect the lives of locals, and will be considerate with cameras or loud vocals."
Most pledges come with warnings or small fines, although the priciest could see you fined up to $1million (£724,000).
Palau's pledge states: "Upon entry, visitors need to sign a passport pledge to act in an ecologically and culturally responsible way on the island, for the sake of Palau's children and future generations of Palauans."
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It includes not damaging the local marine life, not feeding fish and sharks, not taking fruit or flowers from the gardens and not littering.
The government are allowed to fine the hefty sum for anyone who signs the pledge but ignores the regulations.
Other pledges are less strict, New Zealand's Tiaki Promise asks to "respect the culture and care for the land" while Hawaii's Pono pledge is for locals and tourists to respect the island.
In Venice, new measures including charges for day-trippers and limits on daily visitors are being introduced.
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