The next day, we went to the beach.

Common punctuation practice in writing.

I don't know if it is fair for all nations, but Russians, when theythis is reflective of all ethnicities: But when Russians travel abroad, they do their best to not meet other Russians.

I recall the cognate to "nation" in Russian meaning "ethnicity" in this sense — a community of people with some common culture. However, "nation" in modern English only means a nation-state.

Fun fact, women (fully dressed): The locals would separate themselves into women and kids were sitting under one umbrella, men (fully dressed) under another, and only Russians (in swimsuits)and men under another — all adults fully dressed. Only Russians mixed under onthe same umbrella — and in swimsuits.

Interesting way to illustrate the differences in gender dynamics and clothing customs. I — as someone learning Arabic and interested in Arab society — didn't have much problem comprehending your original sentence. But one other corrector was ostensibly confused (understandably), so this separation of the two components into parallel clauses should make the meaning clearer.

We joined the Russian group most of the members were under 60which had mostly under-60 members.

(If you intended for it to be one sentence); otherwise add a full stop.

I believegathered that the locals were discussing our group because offrom their smiles and faces with slight contempt.

The definite article "the" should be used to refer to that specific group, and not confuse for locals in general

I'm not a swimming person and I don't want to get a tan t. That's why I covered myself with a ton ofmany layers/a ton of sunscreen under the umbrella, and just observed differences between the groups.

"layers" in in association to a number; whereas "ton" is a non-numerical indication of quantity. Use either, but not both as it's superfluous.

There was one young woman who fearlessly lyingay (or laid, or lied) down in a bikini under the sun with no emotions on her face under the sun.

1. There are multiple past tenses of "lie": lay is more archaic, but the other two are also clear and accepted.
2. Adjusted word order to more precisely convey that it was about her laying her body under the sun, not her emotionless face being under the sun.

If men were satisfied with the view, women were the opposite.

Yes, I was described local only,ing only the locals. Russians paid no attention, t: They were busy talking about food, hotels, markets, or discussing what part of Russia were they from.

1. Same point about the definite article: Refer to the prior correction.
2. First sentence has no ambiguities in meaning. But if you want to reduce the "a foreigner wrote it" vibe — rewrote it for such
2. Use of colon to more clearly denote the elaboration of a statement.

InAt one momepoint a local woman began to beat the drum and sing something, and one Russian babushka started dancing.

I thought it would melt the ice between the groups, but it seems ited to only madke theat local laugh.

1. Same point about the definite article: Refer to the prior corrections.
2. Are you referring to that local woman only, or the non-Russians there in general?

It is only my opinion, but I think they couldn't get why senior people are okay with their bodies and they are not shy to show imperfections.

This sentence left me confused — please clarify.

I don't know if it is fairthis is true for all nations, but when Russians, when they travel abroad, they do their best to not to meet other Russians.

We walked through the sand searching for the availableunoccupied beach umbrellas.

Fun fact, women (fully dressed) and kids were sitting under one umbrella, men (fully dressed) under another, and only Russians (in swimsuits) miof both sexeds under one umbrella.

We joined the Russian group m. Most of the members were under 60.

I believe that locals were discussing our group because of their smiles and faces with slight contempt.

I'm not a swimming personer and I don't want to get a tan that's why. So, I covered myself with a ton of layers of sunscreen under the umbrella and observed differences between groups.

There was one young woman who was fearlessly lying dowunder the sun in a bikini with no emotions on her face under the sun.

Of course, all eyes were on her.

If men were satisfied with the view, women were the opposite.

Yes, I described'm talking about locals only,; Russians paid no attention, t. They were busy talking about food, hotels, markets, or discussing what part of Russia were theythey were from.

InAt one momepoint, a local woman began to beat the drum and sing something, and one Russian babushka started dancing.

I thought it would meltbreak the ice between the groups, but seems it only made the locals laugh.

It is only my opinion, but I think they couldn't get why senior people are okay with their bodies and they are not shyafraid to show imperfections.

I don't know if it is fair for allthe same for other nations, but when Russians, when they travel abroad, they do their best to not to meet any other Russians.

IHowever, in Jordan, it was the opposite.

ABut all of them were occupied by locals.

Fun fact, women (fully dressed) and kids were sitting under one umbrella, men (fully dressed) under another, and only Russians (in swimsuits) mixed under one umbrella.

i'm not sure what you're trying to say here.

We joined the Russian group and most of the members were under 60.

I believed that the locals were discussing about our group because of their sinister smiles and faces with slight contempt.

I'm not a swimming person and I don't want to get a tan that's why I covered myself with a ton of layers of sunscreen under the umbrella and covered myself with a ton of sunscreen and stayed under the umbrella because I don't like swimming, nor getting a tan, and just observed the differences between groups.

There was one emotionless young woman who fearlessly lying down in a bikini with no emotions on her face under the sun.

If men were satisfied with the view, women were the opposite.

Yes, I described the locals only, Russians paid no attention, they were busy talking about food, hotels, markets, or discussing what part of Russia were theythey were from.

In one moment a local woman began to beating the drum and sing something, and one Russian babushka started dancing.

I thought it would melt the ice between the groups but seemsed it only made the locals laugh.