This is a great half day trip if you want to see something of the Vienna woods. The monasteries were beautiful, especially the stained glass windows. The underwater lake was a unique and enjoyable experience even though the recent history attached to it is very sad. Lastly, the guide, who was fluent in three languages made every effort to inform all the people on the bus of the history of each place we visited. He was very impressive and congenial. All in all, I would recommend this trip without hesitation.