Ghost Acres is the most unsettling of the Lost Blocks — not because of what it contains, but because of what it is. Located near Old Harbor in GLMZ's waterfront district, Ghost Acres is the only Lost Block that is not consistently visible. It appears on some satellites but not others. It is present in some orbital passes and absent from others taken hours later. Infrared imaging captured at 0200 shows a neighborhood — buildings, streets, an open space that might be a dock or pier. The same infrared array at 1400 shows an empty lot. Ghost Acres does not simply resist entry. Ghost Acres resists existence.

The intermittent visibility follows patterns that researchers have struggled to define. Time of day matters — Ghost Acres is more frequently visible during nighttime passes, but not exclusively. Weather does not appear to correlate. The satellite's orbital angle matters somewhat, with lower-angle passes more likely to capture the block, but exceptions are frequent. One researcher has proposed that the visibility correlates with tidal patterns in Lake Superior — not perfectly, but with a statistical significance that is difficult to dismiss. If the lake's water level at Old Harbor is above a specific threshold (which the researcher has calculated to four decimal places), Ghost Acres is more likely to be visible. If the water is below that threshold, Ghost Acres is more likely to be absent. The correlation is approximately 73%. This is not conclusive. This is also not random.

When Ghost Acres is visible, thermal imaging shows approximately 70 heat signatures. When it is not visible, the signatures are also absent — not hidden, absent. The heat is not there. The power consumption drops to zero. The space registers as an empty lot on every sensor. Then, hours or days later, it is a neighborhood again, with 70 signatures going about daily routines as if they had never been interrupted. The signatures do not show startup patterns — they don't wake up, turn on lights, begin activity. They are mid-activity. They are cooking a meal that was not being cooked a moment ago. They are walking down a street that did not exist a moment ago. They resume.

Ghost Acres is the Lost Block that keeps physicists awake at night. The other blocks are spatially anomalous — present but inaccessible. Ghost Acres is temporally anomalous — intermittently present, intermittently real, tied to conditions that suggest it exists on a threshold between states. Dr. Mbeki-Larsen's urban cyst model does not predict Ghost Acres. It predicts the other six. When asked about Ghost Acres, the physicist paused for a long time and said: 'That one isn't a cyst. That one is something else.'