Hello @besamu, this is a very interesting topic.
"Doing a little bibliographic research, I was able to find that it is not an easy task to build any figure, of certain proportions, that you want to last a bit over time. Some secrets have to do with keeping the figure well damp with seawater, both day and night, well compact, since dryness would mean the death, before being born, of what you want to build"
I agree it is not an easy task and is an art form that takes considerable skill and technique. I was able to see the sand skyscrapers at the Dubai Marina. Luckily it rains there only twice or thrice a year so they can keep this in tact all year round.
Dear discoveringarni, it is good that you were lucky enough to see in person the sand skyscrapers in the Dubai Marina, Obviously the almost no rain helps to keep the structure in time, I just wonder if it is not a kind of slavery having to keep it moist for such a long time so that it does not deteriorate quickly. Unless it were not true that it is necessary to keep it moist for its preservation, in such a dry environment. Here, in the tropics, I think it would be quite difficult. Thank you for your comment. Have a nice week.
I'm guessing the sandcastle stayed there briefly unless I'm wrong, because in Dubai they change the entire landscaping throughout the city every season. People get bored easily with what they see so they continue to change. I agree it's quite difficult to maintain in the tropics.