This is the 1154th most frequent Dutch word.
toeristische
"Toeristische" means "touristic" or "related to tourism."
In this sentence, 'toeristische' is used as an adjective to describe 'attracties', indicating that the attractions are related to or appealing to tourists.
De stad heeft veel toeristische attracties.
The city has many tourist attractions.
Here, 'toeristische' is again an adjective, modifying 'plekken', showing that the spots referred to are of interest to tourists.
Wij volgen een route langs de toeristische plekken.
We follow a route along the tourist spots.
In this usage, 'toeristische' modifies 'groepen', specifying that the groups are composed of tourists or are oriented toward tourist activities.