Cinder cones range in size from tens to hundreds of meters tall.

The apple board is going to work out that if they make toffee apples they'll eat more apples as well.

It is part of a group of four young cinder cones NW of Las Pilas volcano.

So this is a cinder block, uncoated, and you can see that it's porous, it absorbs water.

What I have here is a cinder block that we've coated half with a nanotechnology spray that can be applied to almost any material.