Stuck for a day in Vienna

Reading the itinerary for this trip I alread thought it would probably be a close call at Vienna airport since the connecting flight leaves only 45 min after we were due to arrive, but at Amsterdan Schiphol airport it already became clear that we wouldn't make the connection. A portugese plane was stuck at 'our' gate and just wouldn't leave. When it finaly did 'our' plane docked at the gate and they were still cleaning and loading Luggage at the time our flight from Vienna to Yerevan was leaving.
I already met some of the members in my group, you could easily pick them out of the crowd; looking at the clock and looking a bit lost.
At Vienna airport we all (our group) headed for the Austrian Airlines desk to get more information and we were booked on the next flight (24h later) to Yerevan and were given a hotel voucher and a overnight-survival-kit

At the hotel we got the keys to our rooms and some of us agreed to meet before breakfast and plan our day in Vienna. Instead of a city tour Yerevan we did our own city tour Vienna
Totally unprepared for Vienna we just took the train down town and started walking,

Past Stephansdom (Domkirche St. Stephan) can't miss it, to the stables of the 'Spanische Hofreitschule'

Lunch (well cake and drinks) at a small café

and some relaxing at the park, more strolling through city center and back to the Airport hotel. We didn't risk getting late at the airport and at the same time we were supposed to leave yesturday
In Yerevan our guide was waiting for us, again. We contacted the travel agency on our delay but the message wasn't forwarded to our guide so she had been waiting for us for two nights now