Fallas in Valencia is one of the reasons I live there! It is mindblowing, especially the Mascletá and Nit del Foc . Some of the most amazing fireworks you'll ever experience. Seeing a video of it does not quite capture the experience. The fallas (the statues) themselves are stunningly creative. If you ever get the chance you should check it out!

Here is a post of mine about Valencia in general:
https://steemit.com/travel/@the-traveller/valencia-an-underrated-base-for-digital-nomads-interested-in-spanish-living