When the War-Khasis tribe needs a new bridge to cross one of the many criss-crossing rivers of the cherrapunji region, they don't build one. They grow it.
The root bridges, some of which are over a hundred feet long, take ten to fifteen years to become fully functional, but they're extraordinarily strong - strong enough that some of them can support the weight of fifty or more people at a time.
Because they are alive and still growing, the bridges actually gain strength over time - and some of the ancient root bridges used daily by the people of the villages around Cherrapunji may be well over five hundred years old.
Link - via rootbridges
From the Upcoming ueue, submitted by coconutnut.
*coughs...... shrug*
Imagine you could grow the frame of a house like that...?