A catenary arch and the last arch of the trip. (at Arch of St. Louis)
A catenary arch and the last arch of the trip. (at Arch of St. Louis) -- source link
Tumblr Blog : godlymachine.tumblr.com
A catenary arch and the last arch of the trip. (at Arch of St. Louis) -- source link
Tumblr Blog : godlymachine.tumblr.com