Spain and parts of mainland Europe will fall dark on Wednesday evening for the first time in 121 years, as a total solar eclipse traces a path from Greenland across the northern Atlantic and over the Iberian peninsula — an event that has filled hotels and turned a string of quiet Castilian villages into makeshift astronomy hubs.The last total solar eclipse, as seen from Arlington, Texas, in April 2024. (AP Photo)The Spanish mainland has not seen a total eclipse since 1905. Nasa places the path of totality across Greenland, Iceland, northern Russia, the Atlantic Ocean, northern and central Spain, and…