Explore a tunnel, have your ears blasted by some of the most impressive car sound systems in the lower North Island, and pick up some bargains.
That's what's on offer at Spotlight on Seaview Industrial Fair, running from 10am till 4pm this Sunday.
The co-organiser of the 2012 event, Courteney Bradley-Fox, says 57 businesses are involved this year.
Pelorus Sports House and tenants, including Touch New Zealand, Swimming New Zealand and Wellington Rugby League, are putting on interactive games at their Hutt Park home.
Macaulay Metals will have the Monster Truck car crusher in action, Teacher Direct is having a huge toy garage sale, and the Opus wind tunnel and concrete laboratory will be open, as will Seaview marina.
The full list of participants and activities is at spotlightonseaview. co.nz and there's also a Facebook site.
Download the map, and it's also your passport to be in to win prizes as you collect stamps by visiting various enterprises.
Turners Auctions is giving away a second-hand Volkswagen Polo and is running a "Sound-Off"' competition.
Chelsea Whittington says around 20 cars with souped-up sound systems will be creating decibel mayhem as they chase a prize for being the loudest.
Several drag racing cars are expected to be there as well.
The fun starts at 10.30am.
But one of the most popular attractions is sure to be the chance to head into the pitch-black interior of the tunnel running deep into Wainuiomata hill.
Built in 1932, initially with the idea of carrying vehicular traffic, 330 metres of tunnel was built before the hard times of the Depression made it hard to source funding.
It was purchased by the Wellington Regional Water Board in 1975.
That board finished off the final 540m of the tunnel, at a narrower width, to accommodate a water main that today carries around 20 million litres of water a day for supply to Wellington.
Shelly Grant, marketing adviser to the regional council's Water Supply Group, says visitors should bring torches and sturdy shoes.
"It's dark, dank and quite interesting really - a piece of our history. And it could be quite spooky for wee kids!"
- Hutt News