There are plenty of things to keep a hero busy in The Elder Scrolls 4: Oblivion Remastered. If you're not occupied with one of the many guild quests, there are countless Oblivion Gates to shut, or even an arena to test your combat prowess. However, everyone's favourite pass time is undoubtedly dungeon diving for rare loot and materials.
The success of Oblivion Remastered should matter.
However, one of the main complaints about the game is that it doesn't tell you if you've already cleared a dungeon. This is usually done via a separate marker or greying out its icon in other games. While enemies and materials in Oblivion's dungeons respawn, it would be great to have a marker to know you've visited it. It turns out that there is a roundabout way to check this.
As pointed out by Amatuer_Genius54301, there is a way to check if you've visited or even fully cleared a particular dungeon. You can simply zoom in on the dungeon icon on the map to reveal the local minimap. If it's entirely filled out, it means you've cleared the dungeon before. Sure, it's not as easy as a green tick on the map, but at least...