In Borderlands 3, there are different challenges for each area which you can complete. Doing so will help you not only complete an area percentage wise, but also earn you good amounts of Eridium.
The best way to spend Eridium is probably on cosmetic items from Crazy Earl. One of these challenges is to sabotage radio towers found in-game.
Below, you can find a quick location guide for the Radio Tower in Ascension Bluff. For more Borderlands 3 Guides & Best-of content for PS4, PC and Xbox One, make sure to check out our dedicated area here!
Crimson Radio in Ascension Bluff
To complete Crimson Radio, head to the location shown on the map below. It’s not far from the main spawn area in Ascension Bluff, located up a hill. Note that the map orientations between the image below and your own game may differ.

Once at this location, you will find the giant radio tower that Moxxi wants you to sabotage. There will be a few enemies to defeat, but none that are too intense. You’ll need to climb up a bit of the metal structure using the new jumping/climbing system.

Once you’re at the top level of the buildings and have defeated the enemies, you can find the computer that you need to destroy to sabotage the tower. There are more towers in other locations that Moxxi wants sabotaged.