The Museum of Bath Architecture (MoBA) explores Bath's architectural story, from medieval roots to Georgian splendor and beyond, housed in the historic Countess of Huntingdon's Chapel, featuring detailed models (including a large city model), drawings, and tools that reveal how Bath became a world-famous Georgian spa city, focusing on its unique honey-colored stone, Palladian design, and post-war development, though it's currently closed for refurbishment.