Fremen Tours operates a small park/wildlife garden 11km from Villa Tunari called Las Hormiguitas (The Ants). The park features a variety of bromeliads and other plant life, as well as some (caged) local fauna. A taxi will take you to Las Homiguitas from Villa Tunari (30 minutes), wait while you tour the site (90 minutes), then take you back to town for B$90.
