A cemetery built on top of a cemetery—creepy. Even creepier, space in the Colon cemetery is so valued, you can only be buried there for 3 years before your time is up and your remains are moved to a storage building. Definitely go, because despite the heebie-jeebie factor, this Top 10 Havana landmark is filled with gorgeous architecture, art, flowers, and a lot of history. There are more than 500 major mausoleums, chapels, and family vaults, plus more than 800,000 graves and 1 million internments to tour, all on 140 acres. Open daily, 8 AM to 5 PM.