The Tricourse is a massive ruined structure, once consisting of three monumental bridges radiating out from the central Ivykeep tower and leading to distant cities. Over time and through wars and natural disasters, much of the Tricourse fell into ruin.

Today, the ruins are officially classified by an alphanumeric system. The northwest, northeast, and south bridges are denoted A, B, and C respectively. Each supporting pillar, or supporting pillar remains, are numbered starting from zero at the middle and increasing outwards.

A: Known as the Grand Plaza; a large platform overlooking the ocean to the northwest. Iconic feature of the downtown district.
B: The two remaining surfaces house Olive Heights and the Olive Arch Skyport
C: What remains of surface C is built over by downtown development

ABC0: Houses Lockby Falls and the lift

A1: Only overhanging arch remnant, poses significant structural concerns
A2-4: ruined, houses some industrial facilities

B1: West pillar of Olive Arch
B2: East pillar of Olive Arch
B3: Olive Arch Skyport base station
B4-5: ruined, much repurposed for stone farmland walls

C1: Underground due to terraforming
C2: Was demolished and reused to construct the upper reservoir
C3: foundations for the Institute of Lost Technology
C4: Was demolished and reused to construct the lower reservoir
C5-8: Seaway supports
C9-10: Was demolished and reused to construct the gateway locks