Although the words in the following square only score 36 out of 50 on my crude scale of merit (because of proper names and spaces), the square as a whole deserves better, as all names are places, and from the same source.
"Ten-Square With Place Names,"
Word Ways: Vol. 36
, Article 24.
Available at: http://digitalcommons.butler.edu/wordways/vol36/iss1/24