Buran
A few years back I got to visit the Buran prototype in Sydney, Australia where it marooned as the tide went out from the Soviet Empire.
It was a fascinating vehicle - it had twin Sukhoi jet engines and an 11,000 litre fuel tank in the cargo bay - this was the flight test model for practicing bump-and-go landings.
maybe the Soviets weren't so comfortable relying on computer modelling of the flight characteristics and flight simulators for crew training. It had ejector seats, too.
Smelled just like an old WWII bomber that I got to sit in in my youth...