If you were cheap you could walk on top of a bridge to the roof, peek in the exhibits and then get totally seduced, come back and pay the five dollars admission.
あるいはケチな人は 橋の上を通り屋根へ渡り 展示物をタダで覗き込みウットリして それから５ドルの入場料を 払い改めて展示を見にくればいい