N3
をはじめ
Not only...but also..., Starting with
私の近所には、公園をはじめ、博物館やプラネタリウムなどがある。
In my neighbourhood there's a park, a museum, a planetarium and more.
Explanation
「Nをはじめ」 means 'starting with N' or 'led by N'. You name the most representative or important member of a field or group, then bring in the whole group of similar things that includes it. The tone is formal, used in speeches, news, ceremonies and official documents. Before a verb use 「をはじめ(として)」; before a noun use 「をはじめとする+noun」: 「社長をはじめとする役員の方々」 (the executives, led by the president).
Mixed up with
Before a noun use 「~をはじめとする+noun」 (「をはじめとした+noun」 is also fine). Exams put 「×をはじめの」 in as a wrong choice.
The thing named first must be part of the larger group (the president is one of the executives, Mt. Fuji is one of many mountains). If it is not included, the sentence is wrong.