Riddle - Where am I hiding?

Question

I was approached by a mate who wanted a riddle to use on his prospective girlfriend on a date to ask her to be his girlfriend.

You can find me 
Where the water trickles
And the water spouts
Between where the sound would be heard
You will find the third
which is the middle
Least covered by green
But not maroon
Open to air

Here's an image for some tips (Hint's because people may not be from Brisbane, Aus).

The lake has a fountain in the middle

The building in the middle, toward the left pathway is a waterfall

Answer 1

He is located at

the Middle of the Open Air Theatre

The reasoning is as follows: Where the water trickles

Water trickles from an open tap (artificial one) or from an almost drying up fountain (natural one) - that means "open" is the first word

And the water spouts

Water spouts at a standpost (aritifical one) or from a fountain (can be natural / artificial one) into air, giving the second word as "air"

Between where the sound would be heard

Sound could be heard in an "theatre", usually a clearer sound giving this word as the third word of the location.

The next 4 lines are direct reference / clues to the location of the structure: which is the middle

The middle of the theatre

Least covered by green

There is no greenery in the theatre, as we can see

But not maroon

Eliminating the non-green objects/structures..here includes is not maroon

Open to air

Is open and clearly seen ...