Having lived in Texas, I would use that to keep out scorpions, which can crawl up drains and even survive the water coming down them. Though I'd also change the strainer to a different design that a scorpion could not so easily squeeze through...
The device is a universal drain stopper. It is designed to keep water in a bathtub or sink. Because it works by sitting on top of the drain, it is not necessary for the consumer to worry about the diameter of the drain opening, as is the case with traditional drain plugs that sit inside the opening.
These work by creating a seal against the smooth surface ...
Srinagar, Kashmir - old city with river Jhelum. The "temple" is in fact the Khanqah-e-Moula Mosque, one of the oldest mosques in Kashmir.
Here's another old photography, showing a similar view:
(Source: https://www.spiked-online.com/2019/08/13/kashmir-a-tale-of-two-mothers )
A modern stock photo from that place:
Google has a similar but modern view:
My guess is that this would be to prevent sewage smell coming into your room. It's a common problem, see for example this Q&A online.
While I haven't seen such lids before, I've come across many such drains which allowed sewage odors into the hotel room. This was especially a concern in the following conditions:
A well sealed-off room, common with ...
I consider both flags to be black-white-red and not blue-white-red, which makes them the colors of the merchant marine of the Norddeutscher Bund, Kaiserreich, or Weimarer Republik. The relatively modern design of the barge or small tugboat excludes the Norddeutscher Bund.
With hhm's probable identification of the Michaeliskirche, this would be Hamburg ...
Probably not near those two cities. This is a highland grazing area, I am thinking nearer to the Altiplano. I am hoping someone would recognize the shape of that mountain, which looks a bit like Illimani near La Paz, Bolivia.
From this source, we see:
A Tambo in the Mountains at a Height of 16,000 Feet, Andes Mountains, 1849. Attributed to Robert H. Vance (1825–1876).
So the mountains are the Andes Mountains. Don't know how helpful this is for the location of the image, though. You see for yourself!