Læsø

It's a particular kind of sea grass called eelgrass.

So this had been put on my radar as a journalist when I interviewed a roof thatcher who had been using this eelgrass on this island of Læsø off, off, uh, Denmark's Jutland coast.

And so I thought, "Well, I'm gonna have to go out and see it for myself." So I traveled to Læsø and discovered these incredible houses that had been thatched with this sea grass, um, over hundreds and hundreds of years.

These ...

I mean, these are just the most astonishing little houses you've ever seen.

It's not good for ...

I mean, the more unnatural fibers we bring into the house, the more we struggle with things like mold, and black mold, and, um, the ventilation is a problem.

But actually, when I went to visit Læsø and I spoke to, um, a thatcher who had been thatching there for many, many years, he told me that his stepdaughter was now living in Copenhagen and using this, this eelgrass in new, exciting ways.