The Zero Milestone is an iconic point of interest located in the heart of Washington D.C. It is a small, simple yet significant monument that marks the center of the city, and the starting point of all the major roads in the United States. The Zero Milestone was built in 1923, and it was originally designed to be the point from which all distances from Washington D.C. were measured.

There are several good reasons to visit the Zero Milestone. Firstly, it is an important historical landmark that symbolizes the centrality of D.C. to the rest of the country. Secondly, it offers a unique perspective on the city's layout, and how it is connected to the rest of the country. Thirdly, it is a great spot to take photographs and capture the essence of the nation's capital.

Visitors to the Zero Milestone are likely to see a small, granite monument that stands no more than three feet tall. The monument is engraved with the words "Zero Milestone" on its top, and it is surrounded by a small circular plaza. Visitors can walk around the monument and take in the view of the surrounding area, including the White House and the National Mall.

In summary, the Zero Milestone is an important and unique point of interest in D.C. that offers visitors the chance to see the center of the city and the starting point of all major roads in the United States. With its historical significance and central location, it is a must-see for anyone visiting the nation's capital.