REALLY stranded in Amsterdam!

After checking multiple times at the British Airways transfer desk all day(which was never open)we were left with no other option then to do what we were told and print our boarding passes for our changed flight at the gate.  This is normal procedure we are told.  The only flaw with printing you boarding pass at the gate is that if there is a problem with the booking the airline has no time to fix it before the flight leaves.
Yes, that is what really happened.  We arrived at Gate D16 scanned our bags, walked up to the desk, asked to have our boarding passes printed and handed over our paperwork from KLM.  That is when British Airlines realized that KLM only booked one ticket for both of us on the flight! After waiting in the airport for over 7 hours we find out 30 minutes before we leave that KLM made a huge error and I had no ticket! They did not have room for both of us! All I could do was cry.
KLM then sent us to 2 different transfer stations. Finally got a nice man to figure things out for us. "This mistake should never happen" he told us.  Unfortunately due to our cancelled flight from the morning, 300 people had to be dispersed over multiple flights.  The earliest KLM could get us to Toronto is tomorrow leaving at 5:30pm.
Once the reality had set in that we will be hear for abother 30 hours. We have opted to see the postitive in the situation.
1.We will be flying top deck,first class on a 747 Jumbo Jet.
2.We will be treated to Drinks, Dinner, Breakfast and lunch courtesy of KLM.    
3.We are in a lovely hotel with the softest bed we have slept in in over a week.
4.We have always wanted to see Amsterdam.

So although the last 24 hours has been extremely frustrating for us we remind ourselves that we are so wonderfully blessed.  So we will be taking the train into Amsterdam tomorrow morning and taking in some sights.  Any suggestions on things we should see in a quick 5 hour tour of the city?:)