How to create more Land

Example: I would really like to build this hospital here, but according to the game, there is not enough room here:

---

Let's change that.
Every time a road is build, the area around it gets leveled. Near the beach, this mecanic can be used to fill in some extra land:

Building a road and afterwards. Notice the small dent on the right side. So if you do this often enough, the building will eventually fit:
It fits!

---

This works with all kind of buildings:
And if you're patient enough you can even fit an Airport!

---

Just make sure that you don't always place the road in the same place, but always close to the water as possible so that each time a little land is filled in.