The prevalence of large genomics datasets has made the need to explore this data more important. Large sequencing projects like the 1000 Genomes Project have produced over 200TB of publicly available data, while existing genomic visualization tools have been unable to scale. In this work we present Mango, a scalable genome browser built on top of ADAM that can run both locally and on a cluster, combining optimizations that drive novel genomic visualization techniques over terabytes of genomic data.