There are more than 100 mansions and castles in the area.
I name a view important palaces.
Skokloster one of the best baroc castles in Zweden.
Drottningholm Royale Palace build in 17 hunderd, now on the Unesco World Heritage list.
Tido the house of Lord Axel Oxenstierna.
Engso is rebuild in 1740 in frence rococo style .
It was a trip from 500km and more.
But you can find here a famous architecure of Swedis era (1611-1721).