This is the 15790th most frequent Russian word.
прогулками
"Walks" or "strolls."
In this sentence, "прогулками" is the instrumental plural form of "прогулка" and refers to the activity "walks".
Мы наслаждаемся вечерними прогулками по парку.
We enjoy evening walks in the park.
Here, "прогулками" describes "walks" that happen during the summer, again in the instrumental form.
Летними прогулками легко наслаждаться в хорошую погоду.
Summer walks are easy to enjoy in good weather.
In this case, "прогулками" is used in a context indicating accompaniment or association, referring to her walks near the sea.