A tree of many years. Maybe a Moreton Bay fig? There's a kind of massive, elephantine strength about its form.
There are several places around Sydney where you can find these trees in public parks - they seem so solid, strong, wise.
Many of those in Hyde Park in the city centre are being cut down as being too old and dangerous. You miss their presence, but see unexpected vistas; and it will be another generation that sees the park as we used to, by the time the next ones grow. Some tree planting can only be an act of faith and a gift to the future.