This is the 3922nd most frequent Russian word.
городской
Urban; city-related.
In this sentence, 'городской' is an adjective describing 'велосипед' (bicycle). It specifies that the bicycle is intended for urban use or is designed for city conditions.
Мы купили городской велосипед.
We bought a city bicycle.
In this instance, 'городской' modifies 'администрации' (administration) to indicate that the administration is of the city or municipal.
Эта лава принадлежит городской администрации.
This bench belongs to the city administration.
Here, 'городской' serves as an adjective describing 'пейзаж' (landscape), referring to the landscape that pertains to or is characteristic of a city environment.