23. Riverwalk Stadium

Team: Montgomery Biscuits
Affiliate: Tampa Bay Rays (AA)
Address: 200 Coosa St., Montgomery, Ala.

Built into the facade of a decommissioned train station, Riverwalk easily trumps San Diego's Petco Field for the Best Use of an Existing Structure award in ballpark design. And where a lot of the current crop of retro major league ballparks go overboard with quirky field dimensions and features (we see you, Citi Field) Montgomery went for a more understated approach to ballpark idiosyncrasy when they opened Riverwalk in 2004, including a simple, notched curve in right field to accomodate a flag pole, a feature that doesn't call too much attention to itself, and doesn't make outfielders feel like they're playing in an amusement park funhouse.