See
Points of interest worth getting off the bike for.
South Armagh

Camlough Lake
Keggall Road
The narrow "crooked lake" the village is named after
Near: Camlough Lake loop
Photo: Ron Murray, CC BY-SA 2.0, via Wikimedia Commons

Craigmore Viaduct
North-west of Newry
Railway viaduct completed in 1852 on the Dublin to Belfast line
Near: Newry to Slieve Gullion Courtyard
Photo: HENRY CLARK, CC BY-SA 2.0, via Wikimedia Commons
Creggan Parish Church
Creggan
Historic church and graveyard

Derrymore House
Bessbrook
Off-road trail through the grounds
Near: Newry to Slieve Gullion Courtyard
Photo: Eric Jones, CC BY-SA 2.0, via Wikimedia Commons

Killevy Old Churches
Ballintemple Road
Two joined medieval churches under the mountain
Near: Ring of Gullion Loop, Newry to Slieve Gullion Courtyard
Photo: Ron Murray, CC BY-SA 2.0, via Wikimedia Commons

Slieve Gullion summit
Top car park on the forest drive
County Armagh's highest point, with a passage tomb and a small lake. A 1.5 km round-trip walk.
Near: Slieve Gullion Forest Drive
Photo: Rossographer, CC BY-SA 2.0, via Wikimedia Commons
Ti Chulainn Cultural Centre
Mullaghbane
Start of the Ballykeel Loop, near the folk museum
Carlingford Lough

Carlingford
Carlingford
Medieval village with the Tholsel gate and heritage centre
Near: Carlingford Lough Greenway, Cooley and the Long Woman's Grave
Photo: Wanfried-Dublin, CC BY-SA 4.0, via Wikimedia Commons

Victoria Lock
Newry ship canal
Picnic stop on the greenway
Near: Carlingford Lough Greenway
Photo: Man vyi, Public domain, via Wikimedia Commons
North Louth

Flagstaff Viewpoint
Above Newry
View across Carlingford Lough to the Mournes
Near: Cooley and the Long Woman's Grave
Photo: Eric Jones, CC BY-SA 2.0, via Wikimedia Commons
Long Woman's Grave
Windy Gap, Cooley
Top of the peninsula's best-known climb, at about 220 m
Further afield

Gosford Castle
Gosford Forest Park
Mock-Norman castle used in Game of Thrones. Private, seen from the trails.
Near: Gosford Forest Park
Photo: Diego Lopez Sebastian (Dieglop), CC BY-SA 4.0, via Wikimedia Commons

Hope Castle
Lough Muckno, Castleblayney
Lakeside ruin, empty since a fire in 2010
Near: Lough Muckno loop
Photo: Dean Molyneaux, CC BY-SA 2.0, via Wikimedia Commons