Sand Creek Massacre National Historic Site
Place in Colorado listed on National Register of Historic Places.
Each edition grades its towns against each other only.

Look within 40 miles for the 4 places to visit; none is inside Haswell. On the list: 2 national historic sites, a landmark and a museum, among others. About 7K people a year visit Bent's Old Fort National Historic Site. Further afield, Amache National Historic Site is 53 mi from the centre.

Place in Colorado listed on National Register of Historic Places.
The towns around it, and where to stay →
The 4 outside town cluster to the southwest.
Orange: Haswell. Numbers: the best-known places, matching the list below. © OpenStreetMap contributors
You will find all 6 within 60 miles.
Place in Colorado listed on National Register of Historic Places.
1833 fort located in Otero County, Colorado, USA.
National Historic Site of the United States in Colorado.
Ranked by how many people look them up, so the famous places lead and the local favorites follow.
Sand Creek Massacre National Historic Site: Plazak at English Wikipedia, CC BY-SA 3.0 · Bent's Old Fort National Historic Site: unknown NPS photographer, Public domain · Amache National Historic Site: Tom Parker, Public domain · Fort Lyon: Jeffrey Beall, CC BY 3.0 · Koshare Indian Museum: Ammodramus, CC0 · Crowley School: Ammodramus, CC0