VDNH (Выставка достижений народного хозяйства - Exhibition of Achievements of National Economy) is a big park and a fair ground,
in which each of ex-USSR republics had a pavillion (many still standing today).
Complex is immense, sporting also a Language museum, Hippodrome, lakes, and even an Cosmonautics and Aviation Centre
Nearby is also Museum of Cosmonautics, as well as this famous monument:
More pics HERE
Thanks for looking!