Nazi Germany tried to win World War II by creating "wonder weapons." They actually produced the V-2 Missiles capable of reaching England, and tried, but failed, to develop the atomic bomb.
One of the weapons on the drawing board was the Sun gun. It was supposed to work as a "space station" from which the sun's rays could be concentrated, and fired onto enemy cities.
Arguably, the rocket program was a prelude to a "space program," not an Apollo (moon-walk) program, per se, but the creation of a space station from which "bombs," either the sun's rays, or other space material, could be "fired" onto enemy cities on earth. The end goal was a weapon, like the atomic bomb, that was an order of magnitude more destructive than conventional bombs.
How far along did the Germans get in creating such a "space station," or at least the means to access outer space? Was the "sun gun" just on the drawing board of a few "mad scientists," or something within the realm of technical possibility, given enough time?