Fractal Continuum is my favorite from the set. Spoilery if you're not there yet:

I love museums, and I adore the idea of a science museum gone all wrong. The mechanics are fun but not too tedious like they are in Neverreap. The music is amazing. The views are beaten only by those in Alchemical Research Facility.

Thanks to Fractal Continuum, we now know that most of the big bad non-primal NMs throughout Eorzea are just escapees from the Allegan zoo.