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Castles are much older! Some of the ruins in central America compare in age and are worth the look. But in Europe many of the old ruined castles just don't get many visitors so it's just you and the ruins!
!PIZZA

Yeah, that´s right :) Europe is literally packed with architecture that was built hundreds of years ago and not all of them are popular tourist attractions so you can find some pieces that you can admire in solitude and contemplation ;) But those ruins from Mayan, Aztec, Toltec etc. civilizations in Latin America are also cool! I spent a few years in there too and got to visit some of these landmarks. Fascinating structures.