Harbors:
Makkum
Workum
Hindeloopen
Stavoren
Kuinre
Blokzijl
Vollenhove
Zwartsluis/Genemuiden
Kampen
Elburg
Harderwijk
Nijkerk
Spakenburg/Bunschoten
Huizen
Muiden
Amsterdam
Monnikendam
Marken
Volendam
Edam
Hoorn
Enkhuizen
Medemblik
Den Helder

and the isles:
Wieringen
Urk
Schokland

The present day situation.
Zuiderzee has become:
IJsselmeer.
[zee = sea / meer = lake]
because of the 'Afsluitdijk', the 30 miles long dike connecting the provinces of Friesland and Noord-Holland, finished in 1932

Click here for more about the Afsluitdijk and former Zuiderzee

Mind that the former isles of Urk, Schokland and Wieringen are now incorporated into the Dutch mainland. [colored green on the map]