A whimsical, larger-than-life illustration of "Taste Bud City," a metropolis set on a giant tongue. Visualize different districts dedicated to the primary tastes - a sweet candy land, a savory umami financial district, a sour citrus industrial zone, a salty seaside, and a bitter health food quarter. Show taste bud buildings rising like skyscrapers, with highways of saliva carrying flavor molecules throughout the city. Include cellular citizens going about their daily lives - receptor proteins commuting to work, gustatory neurons firing off messages to the brain. Depict the city's defense systems against invading bacteria, like antiseptic mouthwash raids or the descending doom of a toothbrush. The atmosphere should be dynamic and ever-changing, reflecting the constant influx of new flavors and sensations. Use a vibrant, almost psychedelic color palette to represent the intensity and variety of taste experiences. Add quirky details like a spice trade center, bland suburbs where flavors go to retire, and an amusement park that simulates exotic and extreme tastes.