A Better Cycling Station
images from Disney's "Mars and Beyond" Dell 1957
Walt Disney's Mars ship, designed in collaboration with W. Von Braun,  would make an excellent cycling station for regular trips to the Moon or Mars.  With modern materials and technology some fantastic cycling stations could be built.  Nuclear electric propulsion in the form of a high power density vapor core reactor and pulsed inductive thrusters that have no electrodes to burn out unlike other ion drives and abundant lunar magnesium for reaction mass could be used to make minor course corrections to undo the effects of gravitational perturbation by other bodies in the solar system on the orbits of these cycling stations.  Mag-sails might also be used.
The observation dome has a counter-rotating floor similar to those in rotating restaurants atop some skyscrapers so that passengers can gaze at the stars, Earth and Moon with 'scopes, binoculars and the naked eye without being troubled by the rotation of the station. Velcro floors and boots in addition to seats with seat belts make it possible move around and stay still in the weightless observation dome.   The station rotates fast enough to produce 1/6 G lunar equivalent.