Fortaleza de San Carlos

The Río San Juan & Islas Solentiname

There's not much left of the town's fortress, which dates from 1724, but it enjoys some impressive Lake Nicaragua and Río San Juan views from several lookout points linked by garden trails. The cultural center inside has some interesting displays on local culture, biology and history. It even has a map (c 1791) of the Nicaraguan canal that never was.