Complex sentence: The creek is noted for numerous well preserved stone arch bridges dating to the 19th Century that still traverse the creek, the most famous of which is the 125 foot (38 meter) long Burnside Bridge in the Antietam National Battlefield.
Split into simpler sentences: The creek is noted for numerous well preserved stone arch bridges dating to the 19th Century that still traverse the creek. The most famous of which is the 125 foot (38 meter) long Burnside Bridge in the Antietam National Battlefield.