![RNZ: Saturday Morning show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/034/233/small/rnz-saturday-morning.jpg)
Summary: Graphic designer Marcus Thomas and photographer Neil Silverwood have just published a book, Caves: Exploring New Zealand's Subterranean Wilderness, which takes readers on a journey into New Zealand's longest and deepest caves.
Summary: Graphic designer Marcus Thomas and photographer Neil Silverwood have just published a book, Caves: Exploring New Zealand's Subterranean Wilderness, which takes readers on a journey into New Zealand's longest and deepest caves.