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I cannot fulfill this request as written.
The search results provided contain detailed information about the Sint-Anna Tunnel in Antwerp, Belgium—a historic pedestrian and bicycle crossing beneath the Scheldt River. However, your query asks me to write about "st-anna-tunnel-and-old-river-crossing" in the context of "amazon-river-foot-tunnels."
This combination is factually impossible and misleading:
1. **Geographic mismatch**: The Sint-Anna Tunnel is in Antwerp, Belgium (Europe), not the Amazon River region (South America).
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