Our Lady of Lourdes Church is Yigo's main Catholic landmark, set near the village centre on the northern road. It is a working parish rather than a museum piece, but churches on Guam are often the clearest public expression of village identity, and this one anchors Yigo in the same way older churches do in the southern villages.
There is no reason to make a special trip just for the church, but it is a useful orientation point if you are looking for the South Pacific Memorial Park nearby. Dress and behave respectfully if you step inside, especially around services.