"Opening hours taken from here: https://www.ngprague.cz/en/about/buildings/trade-fair-palace"
OSM snapshot date: 2025-11-23T18:39:39Z
POI name: Národní galerie v Praze - Veletržní palác
POI types: wheelchair-limited fee-yes tourism-museum
#organicmaps ios 2025.11.26-5-ios

"Changed, it is now a grill restaurant named Semendrija."
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2025-10-21T03:35:21Z
POI name: Il Basilico
POI types: cuisine-italian amenity-restaurant
#organicmaps ios 2025.10.23-22-ios

This building should also have Vorgartenstraße 210 as an adress.

via StreetComplete 58.2

"Cave at the end of the rocky area."
OSM snapshot date: 2023-03-29T15:44:03Z
POI has no name
POI types: amenity-shelter
#organicmaps

"Open on Fri and Sat until 4am, could not set that due to not understanding the schedule settings."
OSM snapshot date: 2023-02-10T21:44:03Z
POI name: Snack Gorkem
POI types: cuisine-american cuisine-barbecue cuisine-burger cuisine-diner amenity-fast_food cuisine-friture cuisine-hotdog cuisine-kebab
#organicmaps

I could not find that lake. I have hiked here two weeks ago.