The Cathedral Traverse is iconic, it is also the business end of the Grand Traverse. It traverses Teewinot, Mt. Owen and the Grand Teton via its North Ridge. It is a serious undertaking and should not be taken lightly. 
https://www.mountainproject.com/route/120988408/cathedral-traverse

Kolmen vuoren hike (Three Mountains Hike) is a challenging yet rewarding trail in Southern Konnevesi National Park, Finland.

It loops over three rugged ridges: Kalajanvuori, Kituvuori, and Loukkuvuori. Offering breathtaking views of forests, lakes, and rocky landscapes.

This route stands out for its combination of steep ascents, scenic panoramas, and a sense of solitude, making it perfect for adventurous day hikers or a weekend getaway.