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Dear <<First Name>> <<Last Name>>,
Even though we hope that this December will not be quite as gloomy as our selected newsletter category, the current weather did inspire us to select impressive tunnels as this edition's topic.
Tunnels allow lines of communication to cross underneath or through obstacles such as mountains and bodies of water. They connect places with one another, from cities to countries and in some cases even continents (see Eurasia Tunnel below).
In Structurae, over 6,500 tunnels have already been documented. From the manually driven, antique tunnel of Eupalinos to the machine-built tunnels of today, you can find tunnels of any length and for any use. Here some of the more impressive examples:
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