premise: Follow the signs to the sightseeing point where, on the predictably clear day, you can see acrose48 km (30 miles) of blue ocean to La Desirade, 67 km (42 miles) to Antigua, and even 77 km (48 miles) to the ash-covered peaks of Montserrat.
hypothesis: You can see La Desirade, Antigua, and Montserrat from the sightseeing point.