Every hour (i think) there is ceremony as tribute to Jose Marti (in front of his tomb) which was the only "army" thing I saw in Cuba....guys are young, energic and dedicated...you can not seat during ceremony but stand still...
Cemetary is really beautiful and unique, both tombs and trees.
Open 9am-5pm daily. Interesting graves include those of the Bacardi family (famous for their rum), who later fled the country during the revolution, the grave of the first president of Cuba, Tomás Estrada Palma (American-elected), and the grave of Jose Marti, "Cuba's Greatest Hero." Also interesting is the changing of the guard, which occurs every 30 minutes or so.
In this graveyard you can find the mausoleum of José Marti. Walk around and find some surprising items. The graves are not so big as in Havana, but it's worth a visit.
If you want to know more about the surprising items that we foudn, you can read about it in my travelogue: Walking with Ernesto through Santiago.
It was the best cementerio of Cuba for me. There are very nice marble sculptures, also you may visit to Jose Marti monument and Compay Segundo's graveyard.