It's called Tropical Islands Resort and it's located in Krausnick (about 45 minutes from Berlin), Germany. It has the largest indoor pool in the world and a capacity to receive 8000 daily visits.
But this idyllic artificial site formerly had another purpose. It was intended to build huge zeppelins called "load lifters." However, it went bankrupt and has been empty for a while. Now it is a tropical inland beach with swimming pools and camping.
It was inaugurated on December 19, 2004. The complex has a tropical jungle, beach, artificial sun, palm trees, orchids and birds. The typical sounds of the tropical forests are transmitted through some speakers disguised as rocks or other natural elements. This man-made complex is open all day, every day of the year.
It is so big that a hot air balloon can fly inside it.
The best of all is that you can live there for a while. Small cabins can be rented for a few days. The downside is the incredible amount of resources that go into maintaining it and keeping it running properly.
2 curiosities:
1) If the doors to the dome (seen at the top of the image) were opened too quickly or when it is very cold outside, the contrast with the tropical climate inside would create incredibly strong and even dangerous winds for people and the cabins.
2) There is a humidity of 50-60% throughout the year. This humidity from the interior causes the condensation of water inside the dome and Every now and then a little rain falls.
Videographer:
And the sun? The shadow of the upper structure is projected on the sand and on the ground, seen from above it seems shabby and claustrophobic, this does not convince me.