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United States Naval Observatory

The U.S. Naval Observatory is the country’s leading authority for astronomical and timing data required for navigation at sea, on land and in space. It is also home to the "Master Clock" which provides the precise time. The grounds also serve as the private residence for the Vice President of the United States. Occasional public tours are offered Monday nights.

Naval Observatory, Washington, DC 20392, USA 20392 Washington United States

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