Investigate the estate pool

From Create Your Own Story

Deciding that your curiosity must be satisfied, you head off to the left. Where there's a wooden door strangely in the midst of the massive 10-foot hedges. On it is a sign that says pool, but there's no handle. You can't seem to find any other way to proceed. Do you:

Knock on the pool door

Try pushing the pool door

Break down the pool door

Keep searching the hedges for clues