Translation of overwhelm in Spanish

Thanks for the advice but I know this web site. I'm always open to suggestions. Tell me how can I help you with the correct form of words. This is very important owing to the feedback.
We stayed in this place for quite a while as it was the most spectacular place we have visited so far. It was unbelievable how much thought was put into construction of these magnificent sites.
If we had more time, we would have stayed overnight in Aguas Calientes and visited Machu Picchu before 10 a.m. when the crowd (from Cusco) arrives.