Here's why:
* Scenery is a mass noun: It refers to a general, uncountable concept (like water, air, or sand). You don't count individual pieces of scenery.
* Counters are for countable nouns: They are used to specify the number of individual items.
Instead of a counter, you can use descriptive phrases or quantifiers to express the amount of scenery:
* "A lot of scenery"
* "Stunning scenery"
* "Breathtaking views"
* "The scenery was expansive"
The specific phrase you choose will depend on the context and what you want to emphasize.