Walk past any cemetery in New Orleans and you'll notice a fascinating feature of this city. In New Orleans, the dead are buried in above-ground tombs. Plots were made this way because New Orleans is below sea level, and if bodies were put into graves, they would wash away because of the very high water table. There are many elaborate graves and ones into which many bodies were thrown when new family members took the space. These tombs are beautiful monuments, some dating back to the 18th and 19th centuries. Not all of the cemeteries are open to tourists. There are two worth visiting. One of these is Lafayette Cemetery No. 1 in the Garden District. Lafayette Cemetery No. 1 was placed on the National Register of Historic Places for its significant history, location, and architectural importance. The other is St. Louis No. 1 Cemetery, which is the burial ground of some of the most famous figures from the city's past. Here you will find the supposed tomb of Voodoo Queen Marie Laveau. Go with a tour to get the history of the cemeteries and because some of the surrounding areas around the sites can be unsavory.