Ext Tank Station 88
Credit: NASA via Marcus Lindroos
STS External Tanks S
Space station based on Shuttle external tank fitted out with surplus Skylab hardware from the National Air and Space Museum, concept of 1977.
Ext Tank Station
Credit: NASA via Marcus Lindroos
Ext Tank Station
Credit: NASA via Marcus Lindroos
Ext Tank Station
Credit: NASA via Marcus Lindroos
Ext Tank Station
Credit: NASA via Marcus Lindroos
Ext Tank Station
Credit: NASA via Marcus Lindroos
American manned space station. Study 1980. NASA studied several concepts in the 1980's using the 'wet workshop' approach to the capacious External Tank carried into orbit with every shuttle flight.
Despite the incredible logic of this, NASA management never pursued it seriously - seeing it as an irresistible low-cost alternative to their own large modular space station plans.