The Fort Curtis you visit today is actually a reconstruction of the original earth and timber fort built by the Union army as it occupied Helena in 1862. However, it looks and feels authentic enough to satisfy anyone but the pickiest war buff; the 24-pound Siege Guns are particularly impressive. The new Fort Curtis was formally dedicated in May 2012.
If you go:
Admission is free; interpretive panels explain the site's history.
Links:

350 Columbia
Helena, Arkansas 72342 USA
Mailing address:
Delta Cultural Center
141 Cherry Street
Helena, AR 72342 USA
Phone Numbers:
Delta Cultural Center
+1 (870) 338-4350
+1 (870) 338-4350