To be seen; to be in sight (passive state; e.g., 'X can be seen').
展望台から市街地の夜景がよく見られる。
From the observatory you can see the city's night view well.
博物館の展示では時代ごとの違いが明確に見られる。
The exhibits at the museum clearly show differences between eras.
To be able to see; to be visible or watchable (potential meaning).
遠くの山までこの双眼鏡でよく見られる。
With these binoculars you can see even distant mountains clearly.
天気が良ければ富士山が見られるはずだ。
If the weather is good, you should be able to see Mt. Fuji.
Honorific (sonkeigo) use meaning 'to see' (used to refer respectfully to the actions of someone of higher status).
明日、社長が新しい製品のデモを見られる予定です。
The president is scheduled to view the new product demo tomorrow.
先生が実験の結果を直接見られるように準備しておきます。
I'll prepare so the teacher can see the experimental results directly.
To be worth watching/seeing; to be noteworthy or viewable (evaluative use).
この映画は脚本がよくて、見られる出来になっている。
This movie has a good script — it's become something worth watching.
あの展覧会は人出も多く、見られる展示が揃っていた。
That exhibition attracted many visitors and had displays worth seeing.