Chefina and towers

In ChefinaLand there are $N$ towers standing in a straight line each with a height of $h$$i$ where $1 \leq i \leq N$. All towers are at a distance of $1$ unit from each other. The area between two towers can be defined as the area of the rectangle having **distance between the towers** and the **height of the smaller tower** as it's sides. Chefina is wondering which two towers have the maximum a