The Baird government has unveiled its plans for a $15 million, 200-hectare western Sydney "super park", which the government says will compare to London's Hyde Park or New York's Central Park.

Premier Mike Baird is in full election mode and travelled to Doonside on Wednesday to unveil the Bungarribee Super Park, home to cafes, a tree-house and – possibly - even another Sydney zoo, or theatre.

It occupies about 200 hectares in the northern section of the undeveloped western Sydney parklands, in the suburbs of Mount Druitt, Prospect, Seven Hills and Blacktown.

He described the plans as the biggest expansion of recreational facilities in western Sydney in three decades and a spot for locals to "relax, explore and picnic".

"[This] will become as iconic for western Sydney as New York's Central Park," the Premier said. "It will make such a difference to families across western Sydney."

The park will be as large as eastern Sydney's Centennial Park.

He was joined by Environment Minister Rob Stokes, who said the park will include 15,000 trees, four kilometres of bike and walking paths, several playgrounds and a cafe.

But it could potentially be even more than that.

"There's also a discrete opportunity for a little over 10 hectares to be developed as a zoo or performance space," Mr Stokes said.

The Herald understands the zoo is one of the proposals recently put to the parkland trust, which will independently assess how to use the 10-hectare area.

The park cuts across four western Sydney electorates, including the seat of Prospect, one of the most marginal seats in the state, which is held by one per cent.

Labor claims the idea is derivative and taken from an announcement made by former Premier Kristina Keneally. Mr Baird laughed off those comparisons.

"The people of western Sydney shouldn't have to travel to enjoy world class recreation," Mr Stokes said.

Four million dollars in funding for the park was allocated in the budget last year. The remainder of the capital funding was announced on Wednesday.

The government said today's announcement was the latest in a string of investments in western Sydney tourism including Wet 'n Wild and the Tree Top Adventure Park.

In 2004, then-Premier Bob Carr declared the western Sydney parklands the "lungs of Sydney".

Part of that plan was that 2 per cent of the least environmentally valuable parklands would be set aside for future development, which would help pay for its ongoing maintenance.

Earlier in the day Mr Baird announced funding of $4 million to bring more events to the Blue Mountains, for sponsorship for a yet-to-be-negotiated major event.

"It's a resilient community," Mr Baird said. "The natural beauty of the Blue Mountains would provide the perfect backdrop for an opera or theatrical performance".

The "super park" will be complete by 2018.

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