If you want to experience a hardcore environment, this seed is a good option. It encourages you to overcome many majestic mountains and hills. Moreover, there are two floating islands that make the game more interesting.
How to Play Extreme Mountains Next to Spawn Seed?
There is no difficulty in getting there. After spawning, you must turn right and no longer find the first majestic mountains.
This is an example of majestic mountains you can see in this seed.
It is easy for you to discover a tunnel leading to the mountain from the closest mountain with your spawning place. Dig a little bit, and you will find a tunnel system there.