Waymark
/ˈweɪmɑːrk/
Definition 1 of 1
Pro Tip 1/3Outdoor Navigation
Waymark commonly refers to navigation aids in outdoor activities like hiking, not in urban areas. 
Check the next waymark to ensure we're still on the right hiking path.
Pro Tip 2/3Not Always Physical
A waymark can be a metaphor for guidance in life or projects, not just a physical sign. 
His mentor's advice acted as a waymark for his difficult career choices.
Pro Tip 3/3Historical Use
Waymarks have been used historically before modern navigation tools were developed. 
Ancient travelers left stone waymarks to aid those who would follow them.