Unfortunately, baseball season doesn't last all year (though if you go from Day 1 of Spring Training through the end of Winter Leagues you can get pretty close...), so it helps to have some places to go during those cold winter days to remind you of summer and baseball. Here are some links that will keep you up to date on ballpark news, as well as some of my favorite sites from other ballpark collectors. Some provide reviews, some do not, but all are worth a visit.

Ballpark Travel Planning

Baseball Mapper

MiLB Ballpark Guides 

Ballpark News

Ballpark Digest

Ballpark Reviews & Collections

Digital Ballparks (Eric & Wendy Pastore)

Charlie's Ballparks (Charlie O'Reilly)

Ballpark Reviews (Brian Merzbach)

Ballpark Trips from the Far East (Takeshi Kubota)

Baseball Pilgrimages (Graham Knight)

Project Ballpark (Paul Healey)

Baseball Road Trip (Jim & Andrea Siscel)

Ballparks and Brews (Jim & Gillian Wilson)