Translation of dementia in Spanish

I am trying to learn Spanish because Spanish is becoming more and more important in the USA because of immigrants. Especially here in Texas. I used to live in Nevada for many years. Boring place, gotta tell ya.
We continued to the entrance of Angkor Wat. They told us that if we would wait until after five o'clock we could enter with next day's ticket and still see the sunset. We waited and entered at five.
Although we shared the ruins with about 3000 other tourists, it still left an amazing impression.