This is the 467th most frequent Polish word.
miejscach
"Places" (locative plural form of "miejsce").
The term 'miejscach' is used here in the locative case to indicate locations as a plural noun, showing where the action of 'visiting' occurs.
Lubię odwiedzać różne miejscach w Polsce.
I like visiting various places in Poland.
Here, 'miejscach' identifies various locations in the locative case, providing the contexts where 'unique traditions' might be encountered.
W wielu miejscach można napotkać unikalne tradycje.
In many places one can encounter unique traditions.
In this instance, 'miejscach' again is in the locative case, referring to the diverse locations that are subjects of the discussion.