Since you asked.
The pictured ones look steam generated, let's assume they are. Steam generation: boil a pot of water right? Huge pot, huge boilers yata yata same concept.
Boil water, steam rises and turns a turbine, it spins and generates energy. But the excess steam that didn't get used gets recirculated back to those cooling towers. Big fans and vents to keep the return lines cold or chilled. The steam passes through the now chilled lines and turns back into liquid form. Send the liquid back to the boiler.
Rinse... repeat.
Cooling tower.
OK ok thanks brother, highly interesting! So it's like a locomotive?
Funny. Never really thought about but yeah, iguess a locomotive is basically a cooling tower in motion. That's funny.