Usually when people spend most of an entire day travelling, they end up somewhere amazing: Europe, Florida, even Hawaii. Monday, I travelled for 10 hours and ended up right where I started: A dank Washington, D.C., area metro station.

I set out to ride Metrorail to all 91 stations in one day. The idea sparked when I read about Jody Avirgan, a podcast host and producer for FiveThirtyEight, who rode the New York City subway for almost 14 hours on one September day.

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