Streetcar rides: St. Charles Avenue (green cars) is the oldest continuously operating streetcar in the U.S.; the Canal Street route also provides a pleasant ride.
Riverboat cruises: short or long cruises, some of which have quite good jazz bands on board. Enjoy the Steamboat Natchez Riverboat Cruise. Great way to enjoy 3 attractions in one ... New Orleans food and music during a cruise down the Mississippi. Aquarium Zoo Cruise riverboat cruise package is a great way to see the Aquarium of the Americas and the Audubon Zoo.
River ferry: the budget alternative to riverboats, take the free pedestrian ferry from the foot of Canal Street across the Mississippi to Algiers Point and back for a great view of the river, downtown, and the Quarter.
Festivals:
In addition to year-round attractions, a series of celebrations and festivals provide additional interest:
New Orleans Jazz and Heritage Festival: Also known just as Jazz Fest. Held the last weekend in April and the first weekend in May every year at the New Orleans Fairgrounds, F-Su 11AM-7PM. It is second only to Mardi Gras for importance and size for New Orleans. The festival has been held every year since 1970. The true heart and soul of the Jazz Fest, as with New Orleans, is Music. That includes jazz, both traditional and contemporary, Cajun music, blues, R&B, gospel music, folk music, Latin, rock, rap, country music and bluegrass. But it's not just music. This is a cultural feast with food and crafts. There are thousands of musicians, cooks and craftspeople at the festival and 500,000 visitors each year. Visit the two large food areas where you can sample Louisiana cuisine and see demonstrations from top New Orleans chefs. Be sure to bring plenty of sunscreen.
Halloween: While not as large a celebration as Mardi Gras, Halloween is still a big deal in New Orleans. Locals begin costuming two or three days in advance, with most of the action Halloween night being, of course, in the French Quarter, which becomes a veritable parade of costumes ranging from the traditional to the satirical. Families can enjoy Halloween festivities in their own neighborhoods or at various events around the city specifically geared for children.
Voodoo Music Festival: The pop/alternative/contemporary counterpart to the New Orleans Jazzfest, this is fast becoming a major attraction, hosting multiple stages in City Park over 3 days.
Others Festivals in New Orleans:
French Quarter Festival
Essence Festival
Southern Decadence