You need an embassy visa for Democratic Republic of the Congo if you have a Spanish passport
Visa options for Democratic Republic of the Congo
Visitor visa
Travelers need a visa to visit Democratic Republic of Congo for Business or Tourism. A paper or embassy visa is the only visa available for travelers visiting Democratic Republic of Congo. The visa is typically a stamp or sticker added to the passport. Travelers must obtain this visa from a local embassy, consulate or visa center before traveling.