sentences:  The centre of the city consisted of a number of plazas and architectural groups, with outlying groups and the lake shore linked by causeways.The main architectural groups are the Maler Group to the north, linked to the central area by the Blom Causeway; the South (or Main) Acropolis, the West Group, the Northeast Acropolis, the East Acropolis and a number of plazas and lesser groups make up the site core.The city was linked to the shore of Lake Yaxha by the Lake Causeway.