From Autreppes to Guise, continue on the Axe vert de la Thiérache. At Sorbais, the Axe diverges from the old railway line, which is joined after the village  by the D318.

From Guise, buses :

• ST-Quentin (several a day)
• Laon (several a day)
• Marly-Gomont (rares)

Markets :

• Marly-Gomont, tuesday morning
• Guise, saturday morning

Saint- Algis :

• scenic spot
• church (16th century) with a large square keep and two towers behind the bell tower

Marly-Gomont :

• fortified church with loopholes and corbelled watchtower
• ruin of a water mill

Englancourt :

• one of the most beautiful sites in the valley
• Saint-Nicolas church, a large 16th-century red brick keep with a sanctuary room
• Château de Plesnoye 17th century (not open to the public)

Malzy :

• church with fortified choir

Romery :

• lavoir, oppidum, pigeonnier

Monceau-sur-Oise :

• one of the first villages in France to be equipped with public electric lighting
• micro-power station
• fortified church (16th century)

 Faty : fortified church (17th c.)

Beaurain :

• church with keep (16th century)
• fortified mill

Guise :

• castle (12th-13th century feudal fortress)
• Familistère (19th century) by J.B Godin
• church (15th c.-16th c.) of the hall type with Renaissance porch