This is 99% Invisible.

I'm Roman Mars.

Over the years in this job, I've learned a lot of cocktail party facts about the built environment.

For example, the tallest building in the world is the Birch Khalifa in Dubai.

But the largest building in the world by volume is a Boeing airplane factory in Everett, Washington.

It's 472 million cubic feet.

The longest bridge is in China, as is the longest wall.

No surprise there.

But what about the longest fence?

Reporter Shirley Wong traveled deep into rural Australia to find it.

The longest fence in the world begins just a few hours north of Brisbane on the outskirts of a small town called Jindawi.

Jindawi has a hardware store, an accountant's office, a butcher shop, a beauty salon, and a small hotel on top of a pub.

Oh, I've got a meat tray raffle. I love those.

But I wasn't here to win a meat tray.

I came to Gindawi to meet Doug Henning.

He's a former tourism officer who agreed to give me a tour of the fence

his town is famous for. Hi, so nice to meet you. Thank you. I've been watching the weather.

Amazing. The clouds are going that way. So we should be lucky this afternoon. Okay, great.

I met up with Doug outside the Jindawi Cultural Center right in the middle of town,

and he was standing next to an almost seven-foot-tall sculpture of a dog.

It's all made from small pieces of metal, welded together.

This metallic hound is a dingo, an animal that can only be found on the island continent of Australia.

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