You can find this beautiful restful card in The Postcard Depot store on Hippostcard at https://www.hippostcard.com/listing/sevona-cottage-camp-stella-sand-island-apostle-islands-wisconsin-1912-postcard/16182666
The Hiawatha Streamliner Milwaukee Road Railroad Train postcard - "Nothing faster on rails between Chicago Milwaukee and St Paul Minneapolis" - Curt Teich linen postcard
Pencil in some restful time near the water in summer 2015.
Taggarts Drug Store Interior River Falls Wisconsin 1910c postcard
The UW Milwaukee Libraries house the Bliffert postcard collection of vintage Milwaukee postcards. The collection contains some 755 cards and if you want to experience a slice of Milwaukee life in the early 20th century spend some time browsing the collection here.
Here's just a sampling of what's available for your enjoyment.
The Postcard Depot - the home of vintage postcards online.