Tech-Enabled Urban Exploration: Augmented Reality City Hunt

Scout your target zone on satellite view first. Look for irregular street patterns, abrupt building age transitions, or green spaces that seem artificially placed—these usually mark buried infrastructure or demolished blocks. Download historical maps through the USGS or city archives.

Start at dawn or dusk when thermal contrast peaks. Scan building facades with your thermal camera in video mode, moving slowly. Hot spots in unexpected places (mid-wall, basement level, rooflines) indicate hidden mechanical systems, sealed doorways, or active utilities. Cold spots often mark filled-in windows, bricked tunnels, or underground voids.

Switch to RF detection mode. Walk slowly and note signal strength spikes. Consistent strong signals from unmarked buildings usually mean data centers or telecom hubs. Weird patterns (signal drops in open areas, spikes near old architecture) can indicate legacy infrastructure still carrying current or metal structures interfering with modern networks.

Launch your AR historical overlay app. Stand at street corners and rotate slowly, letting the app align old maps with current view. Screenshot moments where something obvious is missing—a building, a street, a bridge. These deletion points are where the city edited itself.

Document everything geotagged: thermal anomalies, RF hotspots, ghost signs visible only in certain light, manhole covers with unusual markings, utility access points, architectural details that don't match their era. Use voice notes for context—you'll forget the details later.

Cross-reference your findings at home. Thermal anomalies + historical maps + RF signals often triangulate to specific stories: a sealed subway entrance, a filled canal, a demolished factory whose power lines still run underground. The overlapping data tells you what the city doesn't advertise.