Then you should do some reading. Latin America is the most urban region in the world.
We have small pockets with high density like Santiago. It has 1/3 of the population of NYC but 150% of the population density. And NYC is by far the densest US city.
The result of this is wide swaths of nature, I grew up used to seeing no buildings or anything else man made all the way to the horizon. When approaching my hometown we would first see the city glow, because you get actual darkness out in the country. In the US' lower 48 only part of Oregon and Nevada get close to that.
Of course now US companies are once again trying to destroy our land with careless mining.
As others have mentioned, the Galaxy S5 was water resistant and had a replaceable battery. Phones are generally not water proof, so don't go dunking them in water expecting them to work. Use a case for that, also if it floats all the better.
Adding a sealant when you close it isn't a huge chore, although it's nice to be able to just replace the battery without any tools, it's better than charging. Also it would still be water resistant until the first battery change.
Watches have replaceable batteries while having replaceable batteries, too.
As a side note, if you drop electronics in water, take the battery out before taking them out of the water, so that the short doesn't destroy them. The battery will be toast, but that's cheaper to replace.