This site will calculate distances from one point to another as the crow flies. Worldwide. Do it by city name or lat./long.
http://www.indo.com/distance/
I found that my place in the mountains is only 37 miles away from home, if I had a helicopter and helipad at both ends. By road it's 65 miles. :( Some of it winding and picturesque, but 65 miles all the same.
This site has interesting mapping information. It's where I found the link above.
http://www-atlas.usgs.gov/articles/mapping/a_latlong.html