A Castle!
Went to Dover, England, and saw a castle. The newest section was built 300-400 years before my country was founded. I turned a corner, and the next part was 200 years older than that. Ten minutes later, walk up to a Roman lighthouse built 2000 years ago.
We got inside, and our room was the largest room we had seen at any of our hotels. apparently, the hotel was built by an American company, so the rooms were built as they would be In the US.) I open the curtains to see what is out my window, usually a parking lot, another random building, or something boring. Nope, a castle!