After seeing this, I poked around online for pictures of people inside of the whale, and I was not disappointed: www.atlasobscura.com/places/malm-...
Malm Whale in Gothenburg
One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.
atlasobscura.com
The only taxidermied blue whale in the world, 1865 CE, now housed at the Natural History Museum in Sweden. The public was allowed to enter the whale up until a couple was found having sex inside it. Now the whale’s jaws are opened only for special occasions, such as Swedish election days.