I find volcanoes fascinating!
Me too. It's crazy how the crust of the Earth ruptures and allows hot lava, ash and gases to escape.
It's weird how that all works. What causes a volcano to erupt?
The erupt due to the Earth's crust being broken into 17 major tectonic plates that float on a hotter, softer layer. 
That's all really interesting! I hear that they're formed because of the plates colliding with each other. Is that right?
Yes, but volcanoes can also form where this is stretching and thinning of the crust's plates.
I'd love to go and see a volcano in person! Any suggestions on which ones are safe to visit?
Sorry. I can't suggest one, but the Northern Cordilleran Volcanic Province is the most recently defined volcanic province. 
I wonder what the largest volcano is?
Volcanic history of the Northern Cordilleran Volcanic Province
The volcanic history of the Northern Cordilleran Volcanic Province presents a record of volcanic activity in northwestern British Columbia, central Yukon and the U.S. state of easternmost Alaska. The volcanic activity lies in the northern part of the Western Cordillera of the Pacific Northwest region of North America. Extensional cracking of the North American Plate in this part of North America has existed for millions of years. Continuation of this continental rifting has fed scores of volcanoes throughout the Northern Cordilleran Volcanic Province over at least the
Volcano
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
Earth's volcanoes occur because its crust is broken into 17 major, rigid tectonic plates that float on a hotter, softer layer in its mantle. Therefore, on Earth, volcanoes are generally found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-oceanic