This is a shelter back from the Soviet Era and Cold War when every house had a shelter nearby in case of America attacking. Most of the things there are 20-30 years old, including the batteries, lamps etc. The glass
retorts with different chemicals were used for testing the air on the surface and determining the type of attack - different chemicals indicated different type of attack: nuclear, chemical, biochemical etc.
Antonov or AN-225 was not the only Soviet cargo jet used for the Soviet Space Program. VM-T Atlant (the picture above) also coped with a task of carrying ultra-heavy and oversize freight, such as rocket boosters or the space shuttle, and it might be a real alternative for AN-225. But this project was closed because of some disadvantages. Nevertheless the shots of Atlant in action
with the hydrogenous cistern for the rocket booster look quite enchanting. Even more, some people joked that this plane was used for transportation of Pepsi Cola from the USA to Russia during the "perestroika" times. See also: Buran, The First Russian Shuttle More About Buran Antonov. The World’s Heaviest and Largest Jet Where is Buran Now?