I'm not exactly sure of the best way to ask what I am trying to achieve, so I'm going to describe it here. If someone can identify a more succinct way to ask this, or if it's been answered in a different way, please let me know!
For example sake, I going to describe a photographer's WordPress site, where there would be a Portfolio archive page listing available taxonomies, say Nature, Landscape, and Portraits.
This Portfolio page had a grid of entries, displayed from all various Portfolio taxonomies. Above the grid, would be a navigation bar listing those taxonomies:
All | Nature | Landscape | Portraits
The Nature taxonomy would also have its own page, accessed via the slug: mysite.com/portfolio/nature - I do not want this page to exist.
What's the best way to achieve this? Thanks!