Across the lake northward from Managua the volcano of Momotombo, projecting into the waters, forms a bay in a locality once occupied traditionally by a rich and populous city. If we may credit the Abbé Brasseur de Bourbourg, its ruins are yet to be seen beneath the waters of the bay.[II-38] Captain Belcher visited the country in 1838, and was told that a causeway formerly extended across from the main to the island of Momotombita, probably for the use of the priests of ancient faith, since the island is rich in idols. He even was able to see the remains of the causeway extending in the dry season some three hundred and sixty yards from the shore; but a closer examination convinced Mr Squier that the supposed ruins were simply a natural formation whose extreme hardness had resisted better than the surrounding strata the action of the waves.[II-39] On the slope of a small bowl-shaped valley near Leon is what the natives call the Capilla de la Piedra, a natural niche artificially enlarged in the face of a large rock facing the amphitheatre. It is spacious enough to accommodate four or five persons, and a large flat stone like an altar stands just at the entrance. At Subtiava, an Indian pueblo near Leon, is a stone mound, sixty by two hundred feet, and ten feet high, very like those at Zapatero, except that in this case the stones about the edges present some signs of regularity in their arrangement. It is very probably the ruin of some old temple-mound, and even in modern days the natives are known to have secretly assembled to worship round this stone-heap the gods of their antiquity. Several low rectangular mounds were also seen but not examined at the base of the volcano of Orota, north-east of Leon.[II-40] [Sidenote: CHONTAL BURIAL MOUNDS.]