Premise:
"Although not open to the public, its towers and beautifully carved stone walls can be seen from various vantage points in the city."
Hypothesis: Using the various vantage points in the city to view its towers is a popular pastime.

it is not possible to tell

Premise:
"Their hands went upwards, fingers spread and curled into an unnatural position."
Hypothesis: They raised their hands up, curling and widening their fingers.

yes

Premise:
"Boat cruises are available in virtually every settlement along the Algarve."
Hypothesis: Most of the boat cruises were very expensive and highly exclusive.
it is not possible to tell