SpaceX founder Elon Musk tweeted a video showing the Mechazilla tower at SpaceX's launch facility in Texas. It is a giant launch and catch tower that will “catch” landing rockets.
Also, a video with the tower was published by Michael Baylor from NASA Space Flight:
Until recently, the company only shared renderings of the Mechazilla, but now we can see the actual design of the 140-meter structure. The published video confirms that the construction of this impressive tower is nearing completion.
Engineers say that the tower will catch the Super Heavy in the air when it returns to Earth. The company expects that this rocket launch and catch method will help to significantly reduce (up to about 1 hour) the intervals between flights compared to when rockets land on offshore platforms.
Elon Musk also confirmed that in the future, the Super Heavy launch vehicle and the Starship spacecraft will be returned to Earth exclusively using the Mechazilla.