Canoeing. I'm not an outdoorsy guy at all but everytime I see US tourists in a canoe they just spin in circles. It feels like Canadians are just born knowing.

Parallel parking. And overall parking in anything else than a US parking lot. People have no idea how to move their car around if it doesn’t go straight forward or backwards. I’ve even seen people failing simple K-Turns. I have both a French and US drivers license. Also manual transmission, but that’s less surprising.

Swimming. It's sometimes dangerous for foreign children to see Dutch kids swim and try to join them.

Simple math like additions and subtractions. Giving change back seems like trigonometry for some. (Note, I actually do enjoy trigonometry. It’s so much easier to calculate angles with fractions of Pi than the random 180°)

Swimming. Here, kids have to take mandatory swimming courses at school. I have quite a few eastern european friends, and they all tell me, that swimming is something that people learn if they want to and if they can afford it, but it's not learly an universal skill in their countries.

Most people who drown here are actually immigrants, who see everyone swimming and think that it can't be that hard...