Will give !
write a brief description of guell park?

Park Güell is one of the most impressive public parks in the world. The park is located in Barcelona and was designed by famous architect Antonio Gaudi. Gaudi planned and directed the construction of the park from 1900 to 1914 for Eusebi Güell for a residential park intended for sixty single- family residences.

Explanation:

your word would be isle.

isle is an island or peninsula especially a small one.

if you add the letter "a" you get aisle, which is a passage between 2 rows of something like chairs, shelves, or something else.