Hands down, New Orleans Square is the best themed land at Disneyland. Even better in years past, when all its shops offered unique merchandise and its restaurants a true taste of The Big Easy. Just take a look of this map from the mid 70s.
With two world famous attractions in Pirates of the Caribbean and The Haunted Mansion, the Mark Twain Riverboat (though technically from Frontierland) rounding the Rivers of America, and a variety of great live jazz, this segment of the park still remains the crowning jewel of the entire Disneyland Resort. Want a World Showcase experience on the West Coast? This is the place to go.