Koutammakou is the UNESCO World Heritage cultural landscape that covers the Batammariba homeland on both sides of the Benin–Togo border. The Togo side (about 50,000 hectares) was inscribed in 2004 and is the better-documented half; the Beninese extension was added in 2023, recognising that the cultural landscape is a single continuous fabric of tata compounds, ritual sites, sacred groves, and the agricultural land that supports them.
For a visitor based on the Benin side, the practical question is whether to cross. The Togo border is just a few kilometres south of Boukoumbé and crossing is straightforward in principle — minor border post, short queue, modest fees — but you will need a Togo visa arranged in advance unless your nationality is exempt. On the Togo side, the village of Nadoba is the usual destination, with its weekly Friday market that draws Batammariba from across the cultural area. If you cannot or do not want to cross, the experience on the Benin side around Boukoumbé and Koussoukoingou captures the essential thing.