The Lethal Landscaping of The Poison Garden

Skulls and crossbones bar the locked gates on Alnwick Castle's grounds, 35 miles north of Britain's Newcastle upon Tyne. "These plants can kill," signs warn. Don't be scared, though. Beyond lies a charitable trust — and one of North East England's biggest tourist attractions: The Poison Garden.

Read more on my Yahoo Travel story.

Alnwick Poison Garden's gate (Photo by Steve F/Wikimedia Commons)