What is the name of the natural waterway that connects Lake Pontchartrain and was the site of Voodoo celebrations?

Bayou St. John is the correct answer because it is a historic waterway that connects Lake Pontchartrain to the Mississippi River. This bayou has significant cultural importance, especially in relation to the celebrations of Voodoo, which is an integral part of New Orleans' cultural heritage. The bayou served as a gathering place for Voodoo practitioners and ceremonies, particularly influenced by the region's history and the diverse cultural practices of its residents.

The other waterways mentioned do not have the same level of historical significance related to Voodoo celebrations or the direct connection between Lake Pontchartrain and the Mississippi River. Therefore, Bayou St. John stands out not only for its geographical relevance but also for its cultural and spiritual associations in New Orleans.