A closer look
Eurotunnel engineers digging the massive Channel Tunnel between England and France had to use highly advanced laser surveying technology to ensure the two massive boring machines actually met in the exact middle; after years of painfully slow underwater excavation, the British and French teams ultimately connected with only a few inches of alignment error, resulting in a monumental engineering triumph that finally allowed millions of disgruntled citizens to efficiently travel between the two historically rival nations via an underwater train, primarily so they can complain about each other's terrible weather and overpriced food in a significantly shorter amount of time than the ferry used to take
