The site is really nice. The tall granit obelisk stand in a wonderful park atop Breed's hill (and not Bunker hill). By the monument, there is a statue of Colonel William Prescott (which makes a great photo op with the monument in background). The obelisk has 294 steps and it is not worth the effort to climb it. Upstairs, the space is very small and the also small scratched plastic windows only offer a limited view (if you want a view of Boston, go to the Prudential Center Observatory, which is great!)... but if you want to climb the monument for fun, do it !
The visitor center is across the street from the park in one of the buildings lining the street. It is the National Park Service that runs it and it's free. It is very interesting and worth stopping by... but this exibit could be even more complete and educational according to NPS standards and comparing to other historic sites. They have a lot of room that can be use in that building and also a lot that can be told about the history that took place here, in and around Boston.
The Bunker Hill site is a good starting point for your visit to Boston. During the week-end, you can park on some of the streets for free without restriction. But get here early (before 9h00) and walk the park, then see the visitor center (which open at 9h00) and climb if you wish.
From here, follow the red line on the sidewalk (called the Freedom Trail) and head to Boston on foot. It is an easy and very interesting walk.
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