(Image: Ryan Harvey, cc-sa-3.0)

In Part 20 of our weekly link round-up, we’ll explore incredible airplane graveyards, strange guerrilla knitting, re-purposing and recycling tips, terrifying insane asylums and more.

The Most Famous and Notorious Insane Asylums in History (Asylum)

10 Most Incredible Airplane Graveyards on Earth (Environmental Graffiti)

Great Photography (including Urban Exploration) by Tom Blackwell (Lucid Dreams)

Historic Photos of Tyneside Shipyards (Peter Loud)

Graffiti Grannys Yarn Bomb English Countryside (Treehugger)

Cement Factory Ruins Transformed into Castle-Like Home in Barcelona (inhabitat)

How to Turn Old T-Shirts into Effective Fire Lighters (Treehugger)

Prefab Paradise: Ruined Factory Becomes Dream Retreat (WebEcoist)

Awesome Urban & Street Art in Sheffield, UK (Kid Acne)

The Time Capsule House Opened After 100 Years (Environmental Graffiti)