Other than catching up with Tom, the only thing I really wanted to do in Norfolk was ride the Chesapeake Bay Bridge - Tunnel.  This crosses the bay via numerous low level bridges, several high deck bridges, and two tunnel sections.  The total length is over 20 miles, though you are &quot;only&quot; above (or below) water for about 17 miles straight.  The reason the tunnels exist is so that the naval base nearby can be assured of uninterrupted service via water - if the entire thing was a bridge, it would have to be crazy high, and there would be risk of damage to or an attack on the bridge which could snarl naval ship traffic.  The Bridge-Tunnel is one of the 7 engineering marvels of the modern world.  There is a $13 toll to cross.  This picture gives a little more information, scads more is online if you are interested:&lt;br /&gt;
&lt;br /&gt;
Wiki link:  &lt;a href=&quot;http://en.wikipedia.org/wiki/Chesapeake_Bay_Bridge%E2%80%93Tunnel&quot;&gt;http://en.wikipedia.org/wiki/Chesapeake_Bay_Bridge%E2%80%93Tunnel&lt;/a&gt;