I have been looking for titles of films I saw when I was young. This one particular film, from what I can remember had astronauts on a planet doing some exploring and came across what looked like a circular tower that had holes on the sides of it with a ramp spiraling upwards. As they made their way up,what I think was black slime or oil came out of the holes and hampered their progress up. Any ideas?
Maybe a bit of a long shot, since I don't know if you would have watched German movies, but this might be "Der schweigende Stern" (English "First Spaceship on Venus"), a 1960 coproduction between GDR and Poland after Stanislav Lem's "The Astronauts".
This Youtube trailer has the spiralling towers with holes at about 2:25, and astronauts wading through oily stuff.