"The Klondikes" is a term that refers to a region in northwest Canada, more specifically the Klondike River and the gold-rush area around it. Synonyms for this term could include the Yukon Territory, Dawson City, or the Canadian North. Other possible synonyms could come from the history or geography of the area, such as the Gold Rush, the Arctic, or the Northern Wilderness. Additionally, terms related to the significance of the Klondike region could also work, such as wealth, opportunity, adventure, or hardship. Ultimately, the synonyms for "the Klondikes" depend on the context and purpose of the language being used.