So, the ghost tour with Thomas informed us about the various ghost stories of the old town, like for instance The Casket Girls of the Ursuline Convent (that's where the vampire myths come from), or the Queen of Voodoo, or my favorite story of Delphine Lalourie (the New Orleans version of Elizabeth Bathory figure).
We also visited Oak Alley Plantation outside of New Orleans (this is where the car came in handy). The plantation house is not super impressive, although it does have a wonderfully historical and romantic feel, but the main enjoyment (for me and hubby) was in walking the bounds. They have those 300 year old Live Oaks linking the road to and from the plantation. They are INCREDIBLE! The whole atmosphere is magical! It's where the beginning of Interview with the Vampire was filmed (and many other films).
We also took a ride on a boat in the bayous. That is a must. Do not take the fast/loud boat. Take the quet and relatively slow one to really savor the beauty and magical feel of the bayous. It was so wonderful.
We also took a ride on a steam boat Nachez, on the river Mississippi. It was neat for me as a foreigner - to see the famous river and think of Huck-Finn. But it was nothing to wright home about, if you like a action.
We visited St. Louis Cemetery No. 1, again, with a tour guided by Thomas (who is wonderful!) and we saw the grave of the queen of Voodoo and heard lots of stories of famous citizens and general city history.
Thank you to who gave us tips