Where is the ticket office?

You are correct. In the basement. You'll see the stairs leading down.

In the basement of the Mansion, if you need a guided tour of Mansion.

Thank you! Even though on line there were only tickets for 2:00 & 3:00 we were able to walk in & get tickets in basement office for 11:30. We almost didn't go. Great tour for only $5.00 each donation! So much better than Monticello the day before for $30.00 each!!! The gardens & waterfalls were beautiful too!

Below deck.