This is the 5032nd most frequent Russian word.
масштабный
Large-scale, extensive.
Here, 'масштабный' characterizes the achievement as significant and far-reaching in impact or size.
Этот проект считается масштабным достижением.
This project is considered a major achievement.
In this sentence, 'масштабный' describes the festival as extensive and involving many participants or activities.
Город организует масштабный фестиваль в этом году.
The city is organizing a large-scale festival this year.
Here, 'масштабный' modifies the renovation, indicating that the work was thorough and covered a wide scope of improvements.