What is a unique architectural characteristic of the French Quarter?

The distinctive architectural characteristic of the French Quarter that sets it apart from other neighborhoods is the prevalence of wrought-iron balconies. These ornate balconies often adorn the façades of historic buildings and reflect the influence of French and Spanish architectural styles, which are fundamental to the Quarter's identity. The intricate designs and craftsmanship of the wrought iron not only add visual appeal but also serve a functional purpose by creating shaded areas for residents and visitors. This characteristic is iconic to the French Quarter, making it a highlight for tourists and a significant aspect of the area's charm.

In contrast, while flat roofs or specific building heights may be found in various structures, they do not uniquely define the French Quarter's architecture. The use of adobe is more representative of Southwestern U.S. architecture and is not commonly associated with New Orleans.