Oblivion Remastered includes many other regions of Tamriel. Keen players can visit some of them
The developers of Oblivion Remastered have included other areas on the game map than just Cyrodiil. It turns out that some of them are possible to visit, although there are not many attractions there.

The area of Cyrodiil available in The Elder Scrolls IV: Oblivion Remastered is just a slice of the entire Tamriel. The game map also includes provinces bordering it: Hammerfell, Elsweyr, Valenwood, Black Marsh, and Skyrim.
It turns out that nothing prevents visiting some of them. This was noticed by one of the Reddit users, GnoblinXD, who shared his discovery with others.
I was walking along the Strid River from Skingrad and it turns out you jump across into Valenwood near Kvatch. I explored a bit and was surprised to find basically the whole landmass of the map was there, even if not detailed ofc.
The player documented his journey with screenshots and a video showing how to get to Valenwood, the home of the Bosmer, also known as the Wood Elves. This fragment of the map has obviously not been developed, but interestingly, the creators even took care of adding the Summerset islands, which can be seen in the distance to the west. Unfortunately, GnoblinXD didn't manage to reach them.
Inspired by his discovery, he decided to check if the northern region is also possible to visit. It turned out that it is. He found his way to Hammerfell, which according to rumors will be the setting for The Elder Scrolls VI. What's interesting, this is an even larger area than Valenwood and Elsweyr, and it is also covered with trees.
The landmass stretches way beyond render-distance, so who knows how far it goes...
We also know that the creators of Oblivion Remastered included the Throat of the World mountain from the fifth installment of the series in the game. One of the players decided to visit the province of Skyrim and check if there is something more hidden there. Unfortunately, his trip ended with a fall off the map, which he shared on X.
The Elder Scrolls IV: Oblivion Remastered is available on PC, PS5, and XSX/S. The title is also available on the Game Pass subscription.