MAROS, Indonesia — Forty-two kilometers, or about 26 miles, north of the bustling port city of Makassar in Indonesia’s South Sulawesi province, undulating karst formations dominate the landscape. Covering an area of about 43,000 hectares (106,300 acres), the mountains sprawl across two administrative districts, Maros and the Pangkajene Islands (Pangkep), forming the second-largest karst area […]