Saint-Louis-du-Ha! Ha! (French pronunciation: [sɛ̃.lwi.dɥ.ˈa.ʔa]) is a parish municipality in the Témiscouata Regional County Municipality in Quebec, near the south shore of the Saint Lawrence River in Canada. It is located southeast of Rivière-du-Loup and west of Cabano along the Trans-Canada Highway (Route 185), about halfway to Edmundston in New Brunswick. The population of Saint-Louis-du-Ha! Ha! is 1,318.
Saint-Louis-du-Ha! Ha! is the only town in the world with two exclamation points in its name.
The Commission de toponymie du Québec asserts that the parish’s name refers to nearby Lake Témiscouata, the sense of haha here being an archaic French word for an impasse.
A ha-ha (French: hâ-hâ or saut de loup) is a recessed landscape design element that creates a vertical barrier while preserving an uninterrupted view of the landscape beyond.
The design includes a turfed incline which slopes downward to a sharply vertical face (typically a masonry retaining wall). Ha-has are used in landscape design to prevent access to a garden, for example by grazing livestock, without obstructing views. In security design, the element is used to deter vehicular access to a site while minimizing visual obstruction.
The name “ha-ha” is thought to have stemmed from the exclamations of surprise by those coming across them, as the walls were intentionally designed to be invisible.