No matter how many times a European visits the States, there are some Americanisms that Europeans simply cannot get used to.

Here are 16 things that Europeans find strange about America.

1. How are you as a greeting, not a question

When a sales clerk in the States says "how are you" it's not a question, but a way of saying "hello." No matter how often this happens to a European, they will launch into a monologue about their health and well being and ask it right back — and expect an answer.

2. Ice Cubes

Just like Americans are flummoxed by the lukewarm water presented to them in Europe, Europeans can't wrap their heads around how drinks in the US are full of ice. Plus, the average soda-to-ice ratio is approximately 30:70, leaving any cup empty after a few sips.

3. Free refills

Is this because of all the ice? Europeans will never understand why they are presented with a second cup of soda while the first one is still half full in front of them. What's even stranger though, is the fact that one can (and does) order a large soda — despite the refills.

4. Portion sizes

They're huge! Doggy bags are great — who doesn't love a two-for-one meal — but the concept virtually doesn't exist outside of the US, as generally people can easily polish off their dinner.

5. Certain food combinations

Marshmallows and sweet potatoes? Ice cream and soda? Bacon and syrup? These combinations seem odd to Europeans.

6. The Question Game

Most Europeans feel accosted when bombarded with 12,857 questions when they just want to order a simple sandwich.

7. Tipping

The fact that the onus is on the customer to pay for someone else's employees to make a fair wage is mindboggling to Europeans. The fact that they're paying extra for someone to do their job, not even for doing it well, is astounding. Europeans also find it confusing that there's no set amount or percentage one should tip, and who gets tipped seems equally ambiguous.

8. Taxes

Yes, annual taxes are hard for everyone, but that's different. What's just nonsense is the fact that the price you see on an item is not the same one you pay at checkout.

9. Coins

What are these strange nicknames that say nothing about the coin's value? Why is a dime smaller than a nickel, but worth more? Euro coins, on the other hand, are actually called by their numeric denomination.

10. Air Conditioning

Why is the average shop or office set to Arctic temperatures? Indoors anywhere in America during the summer is unbearably cold, and most Europeans are just not used to this.

11. The Measurement System

It just makes no sense. How is 7/8ths an appropriate measurement? How are feet still a thing? The rest of the world has embraced the metric system, and it's high time for the US to follow suit.

12. Being cashless

Few Europeans wander about with wallets utterly devoid of cash, but America is basically a cashless society. Being able to pay for as little as a pack of gum with a card is still amazing to most Europeans.

13. The insane range of options

The average European will walk out of the average American supermarket or deli utterly bewildered by the array of choices they just witnessed. There's an entire aisle for soda? A dozen brands of milk? How many flavors of chips?

14. 24-hour stores

Convenience seems to be the cornerstone of this great country. Stores are open 24 hours a day, 7 days a week. There's a drive thru everything. Most European shops, on the other hand, close at 6pm and all day on Sundays.

15. The drinking age

In most of Europe, the legal drinking age is 18 (and in many places, it's legal for teens as young as 16 to drink alcohol) — much younger than the 21-age limit it is in the US. Europe also has a much more liberal stance on public drinking, as you are allowed to bring alcohol out on the streets — something that you generally can't do in the US, except for these American bastions of civilization.

16. Not taking vacation days

Squandering 169 million vacation days like Americans did in 2013, or not taking a single day off like almost half the country last year is completely and utterly unfathomable to a European.