Rank the top Japanese-style onsens and natural mineral hot springs in and around Hanoi for the ultimate wellness getaway.
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Unlike traditional polls, ranki uses the Elo rating system—the same algorithm used to rank chess players worldwide. When you vote, you're presented with two items from the Best onsen in Hanoi list. Your choice doesn't just add a "point"; it adjusts the relative scores of both items based on the strength of their opponent.
This creates a highly accurate, dynamic leaderboard that reflects the collective wisdom of the community. With 114 votes cast so far, these rankings are the most definitive way to see what truly comes out on top.
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