There are not that many monuments/memorials to so-called Contraband Camps, but there are a few. Most of these places are called Freedmen's Colonies or Camps or Villages today.
One site is the Corinth Contraband Camp, Corinth, MS, which is part of the Shiloh National Military Park sites. These are some photos of it, the first two are from the National Park Service:
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Statues inside the Civil War Interpretive Center at Corinth Contraband Camp, in Corinth, Mississippi; featuring an African American Union soldier and a freedwoman taking a class.
Image Source: Photo/Copyright by Carmen K. Sisson/Cloudybright. Photo is not in the public domain.
In North Carolina, Hatteras Island was an early site of freedom. As noted by Drew Pullen, writing at the web site
Emerging Civil War,
The capture of the Confederate forts located at Hatteras Inlet on August 29, 1861, provided the first Union victory of the Civil War. Almost immediately fugitive slaves began arriving on Hatteras Island in search of freedom. In a letter to U.S. Secretary of War Cameron, dated September 18, 1861, General John Wool inquired, "tell me what I am to do with the negro slaves that are almost arriving daily at this post [Hatteras]…" Union occupancy and control of the island provided for the beginning of the creation of a haven or colonies for fugitive slaves seeking that freedom. Hotel De' Afrique goes down in history as the first of such encampments in North Carolina.
To commemorate its history, a monument to the Hotel De Afrique community was dedicated in July 2013. The black stone monument, less than two miles from the original camp, is located near the entrance to the Graveyard of the Atlantic Museum in Hatteras.
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Monument to the Hatteras Island's Hotel De Afrique, a freedom colony in North Carolina; image was taken during the dedication of the monument in July 2013.
Image Source: Blog for OuterBanksVacations.com.
Roanoke Island, NC, was the setting for an historic experiment during the Civil War. Following the island's occupation by Union forces in 1862, it became a haven for African American families from throughout the region. Their presence prompted the Union army to establish a Freedmen's Colony on the northern end of Roanoke Island.
A marker was erected in 2001 to designate the site of a permanent colony on Roanoke Island between 1862 and 1867.
It is in the Fort Raleigh Historic Site Complex.
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The Freedmen's Colony Of Roanoke Island, Roanoke Island, Manteo, NC.
Image Source: OuterBanks.orf website.
Sadly, there is no monument I am aware of near Fort Monroe, which is the birthplace of the Contraband policy and the site of a large and perhaps the first Freedmen's Village.
- Alan