Question: The summit area of Breed's Hill is the location of a monument that is how tall?

Context paragraphs:
Craignaw: Craignaw is a small but very rocky hill in centre of the Galloway Hills of southern Scotland.  Unlike many hills in the Southern Uplands, Craignaw has a complex and rocky summit area, with a long line of crags and rough ground on the east side.  The hill is largely composed of granite.  Near the north end of the hill is an interesting area of terrain known as the "Deil's Bowlin' Green" where various rounded granite boulders are scatterd at random over an area of nearly horizontal granite slabs.  These are believed to be glacial erratics or result from a similar glacier process.  On the west side of the hill, near grid reference NX458831, a few hundred meters from the summit is an F-111E Aardvark crash site.  The site is marked by a small memorial to the two US Airforce pilots who were killed in the accident (Captains Spaulding and Hetzner).  Although the crash happened on December 19, 1979 there are still small amounts of aircraft debris in the area.

Two Rock: Two Rock (Irish: "Binn Dá Charraig" ; archaic: Black Mountain; "Sliab Lecga " (meaning "Mountain of Flagstones" )) is a mountain in Dún Laoghaire–Rathdown, Ireland.  It is 536 m high and is the 382nd highest mountain in Ireland.  It is the highest point of the group of hills in the Dublin Mountains which comprises Two Rock, Three Rock, Kilmashogue and Tibradden Mountains.  The mountain takes its name from the two granite tors that lie to the south-east of the summit.  From the summit, which is called Fairy Castle, there are views of much of the Dublin area from Tallaght to Howth to the north while Bray Head, Killiney Hill, the Great Sugar Loaf and the Wicklow Mountains are visible to the south.  The summit area is mostly shallow bog while ferns and gorse cover the lower slopes.  The mountain is also an important habitat for red grouse.

Tibradden Mountain: Tibradden Mountain (Irish: "Sliabh Thigh Bródáin" , meaning "mountain of the house of Bródáin" ) is a mountain in County Dublin in Ireland.  Other former names for the mountain include "Garrycastle" and "Kilmainham Begg" (a reference to Kilmainham Priory which once owned the lands around the mountain).  It is 467 m high and is the 561st highest mountain in Ireland.  It forms part of the group of hills in the Dublin Mountains which comprises Two Rock, Three Rock, Kilmashogue and Tibradden Mountains.  The views from the summit encompass Dublin to the north, Two Rock to the east and the Wicklow Mountains to the south and west.  The geological composition is mainly granite and the southern slopes are strewn with granite boulders.  The summit area is a habitat for heather, furze, gorse and bilberry as well as Sika deer, foxes and badgers.  The forestry plantation on the slopes – known as the Pine Forest – contains Scots pine, Japanese larch, European larch, Sitka spruce, oak and beech.  The mountain is also a site of archaeological interest with a prehistoric burial site close to the summit.

Gile Mountain: Gile Mountain is located in Windsor County, Vermont, along the border between the towns of Norwich and Sharon, with the summit located in Norwich.  The mountain reaches a height of 1873 ft above sea level.  Relatively unimposing considering its height, the true summit cannot easily be seen from the surrounding territory, despite the prominent fire tower atop its summit.  The tower is easily reached by taking Turnpike Road from Norwich to the parking area near its terminus.  From here, the Gile Mountain trail leads west 0.7 mi to the summit, passing under power lines.  The summit area contains an old ranger cabin, since converted to a shelter-type structure (though camping is not allowed), and the tower itself.  From the top views are expansive, and on a clear day one can see Mount Ascutney to the south, the Green Mountains from Killington Peak to Mount Mansfield to the west, Mount Cardigan, Smarts Mountain, and Croydon Peak to the east, and Mount Cube and Mount Moosilauke to the northeast with many of the White Mountains beyond.  Dartmouth College is also visible some seven miles distant.

Hockanum Rural Historic District: Hockanum Rural Historic District is a rural historic district encompassing a classically famous landscape along the Connecticut River in Hadley, Massachusetts.  The district includes much of the area in Hadley west of Mount Holyoke and east of the river.  Its formal boundaries run from Hockanum Cemetery in the southwest, following the river and the summit ridge of Mount Holyoke to the northeast corner of J.A. Skinner State Park.  It includes the summit area of Mount Holyoke, including the Summit House, Halfway House, and other historic structures within the park, along with the agricultural lands of the valley below.

Bunker Hill Monument: The Bunker Hill Monument was erected to commemorate the Battle of Bunker Hill, which was among the first major battles between British and Patriot forces in the American Revolutionary War, fought there June 17, 1775.  The 221-foot (67 m) granite obelisk was erected between 1825 and 1843 in Charlestown, Massachusetts, with granite from nearby Quincy conveyed to the site via the purpose-built Granite Railway, followed by a trip by barge.  There are 294 steps to the top.

Foel Cwmcerwyn: Foel Cwmcerwyn is the highest point of the Preseli Hills and of Pembrokeshire.  It lies within the borders of the Pembrokeshire Coast National Park although it is 10 km from the sea.  A path leads to the summit from the village of Rosebush in the south-west.  A trig point and a number of cairns are dotted across the summit area, and there is a disused quarry on the hill's western slopes.

Breed's Hill: Breed's Hill is a glacial drumlin located in the Charlestown section of Boston, Massachusetts.  It is best known as the location where in 1775, early in the American Revolutionary War, most of the fighting in the Battle of Bunker Hill took place.  Much of the hill is now occupied by residential construction, but the summit area is the location of the Bunker Hill Monument and other memorials commemorating the battle.

Moncreiffe Hill: Moncreiffe Hill is a long, wooded ridge that lies south of Perth, Scotland.  It can be easily seen on the right during the final stages of the drive north towards Perth on the M90 motorway.  Unlike most British hills, the routes to the summit are almost entirely under tree cover, although the summit area, which is known as Moredun Top, is clear and offers impressive views over Perth and the Firth of Tay.

Mount Magalloway: Mount Magalloway (or Magalloway Mountain) is a mountain in the Great North Woods region of New Hampshire in the United States.  With a summit elevation of 3383 ft , it is one of the tallest peaks in Pittsburg, the state's northernmost community.  From the observation tower at its summit, three states and the Canadian province of Quebec are visible.  The mountain is climbable via a trail less than 1 mi long that begins at the end of a logging road off Magalloway Road in eastern Pittsburg and ascends about 800 ft .  The summit area includes a former watcher's cabin that is available for rent by the state.

Supporting paragraphs: Breed's Hill Bunker Hill Monument
Answer: 221-foot