On the one hand, dressing up in traditional Dia de los Muertos attire can create a more authentic and immersive experience. Plus, it's an excellent opportunity to show off your creative side with some face painting and colorful costumes. You'll fit right in with crowds parading through the streets and visiting cemeteries. On the other hand, if dressing up isn't your thing or you don't want to spend money on a costume, that's okay too. Tourists are generally welcomed regardless of what they wear - as long as they respect this important holiday's traditions and customs.