63rd Street Tunnel
... that the upper level of New York's 63rd Street Tunnel took 20 years to open, while the lower level is still under construction after nearly half a century?
... that the upper level of New York's <b id="mwA_U"><a href="./63rd_Street_Tunnel" id="mwA_Y" rel="mw:WikiLink" title="63rd Street Tunnel">63rd Street Tunnel</a></b> took 20<span id="mwA_c" typeof="mw:Entity"> </span>years to open, while the lower level is still under construction after nearly half a century?