A 20km route around Bewl Water, Kent.

http://www.gps-routes.co.uk/routes/home.nsf/RoutesLinksCycle/bewl-water-walking-and-cycle-route

The Sandlings Walk is a footpath running from Ipswich to the seaside town of Southwold in Suffolk, UK. Approximately 55-57 miles in length, it is mainly inland and passes through the towns and villages of Woodbridge, Snape, Aldeburgh, Dunwich, Walberswick and the RSPB Minsmere nature reserve. The trail is a mix of heathlands, forests and river paths with a section along the beach between Sizewell and Dunwich.

A classic 66km loop from El Chalten:

El Chaltén (Centro de visitantes, Guardaparque Ceferino Fonzo, Parque Nacional Los Glaciares)
Campamento Laguna Toro
Laguna Toro
Rio Túnel (first zipline)
Glaciar Rio Túnel Inferior
Paso del Viento
Refugio Paso Del Viento
Paso Huemul
Bahia de los Tempanos
Bahía Túnel
Rio Túnel (second zipline)
Estancia La Quinta
El Chaltén (Centro de visitantes, Guardaparque Ceferino Fonzo, Parque Nacional Los Glaciares)

Mt Elbrus (5,642m) is the highest summit in Europe.  The route starts in the Azau Valley at 2450m, and passes by Barrels Hut at 3900m on the way to the top of the higher West Summit.  This route is the course for the Redfox Elbrus SkyMarathon: