Serendipitous (noun): the faculty or phenomenon of finding valuable or agreeable things not sought for.

“This was urban walking after a fashion, repetitive and serendipitous.”

“Walk with Me” – David L Ulin

This word can be seen as a very difficult one to get into as its dictionary definition does not give much insight to the actual meaning, especially in this context. In this context it can be said that the walk was very repetitive, and he was able to find things he did not actually look for? The wording sounds a bit off in either sentence and is clunky both ways. Perhaps this sentence could be structured differently?