Uniformly random lozenge tilings of large domains are locally described by two-dimensional translation-invariant Gibbs measures, with Gaussian Free Field fluctuations and Airy processes at the edges. I will discuss the q-Racah measure on tilings of a hexagon in the regime where q stays fixed instead of tending to 1. This is a strong double-well potential along one lattice direction. It produces a new macroscopic phase, the waterfall, in which the two-dimensional Gibbs structure collapses into a one-dimensional random interface, the barcode. We prove a law of large numbers for the waterfall profile and describe an explicit correlation kernel for the barcode, which is invariant under shifts by 2 but not by 1. Based on joint works with Alisa Knizel and Yizhen Li.