This was some years ago, but when the wife and I entered the Alamo, we had the impression of entering a church - or hallowed ground.
I particularly liked the sign over the entrance: "Gentlemen, remove your hats, for brave men have died here."
The early 70’s is when I paid My respects at The Alamo,,,
Spain has such a site in Toledo (the Alcazar fortress, which I believe was used as a military academy), where a small army garrison (with their families, cadets. and others seeking sanctuary from the communists) held out for months surrounded by communists. They took some losses but held out long enough for Franco to relieve them/break the siege. Franco was advised them relieving them might prolong the war (by delaying the attack on Madrid), but he felt it was important 1) because he had promised them he would, and 2) he felt it was important to show the communists that when the army put its mind to something it could accomplish it regardless of the resistance (which proved true).
A Red (communist) priest visited the garrison to unsuccessfully induce them to surrender, and while he was there the commander asked him to offer a Mass - the only one during the siege. Afterwards a sign was placed there, along the lines of: “In this room our Lord visited our heroes”.
The “Alamo” building that still exists is the mission’s Church/Chapel, thus still considered consecrated ground. All of the buildings and walls that composed the original mission/fort were torn down long ago. I’ve read that the Alamo that John Wayne built west of San Antonio at Bracketville, TX, still exists but has been abandoned/closed as a tourist site: http://www.nydailynews.com/entertainment/movies/texas-movie-set-john-wayne-fading-article-1.2057061
1830-36 Alamo ground plan: http://digital.library.shsu.edu/cdm/ref/collection/p243coll3/id/2316
Alamo sanctuary ground plan: http://www.tamu.edu/faculty/ccbn/dewitt/adp/history/mission_period/valero/alamo_plans1.html