Sir Arthur Conan Doyle once visited the slopes of the highest peak in Marin County, California. On that mountain, a "Gravity Man" commanded a special kind of car for the descent. What kind of car ride was it?


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Fred Hamill answered
Search 'tallest peak Marin County' to find it's Mount Tamalpais. Search 'Gravity Man Mount Tamalpais' and find that he would "turn on the gravity" for passengers of wooden "gravity cars" on the Mt. Tam railroad. Sir Arthur Conan Doyle was among those who enjoyed a thrilling, gravity-powered coast down what was known as the crookedest railroad in the world.

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