Journey to the centre of the earth by Jules Verne

A Journey to the Centre of the Earth on Wikipedia translated from the French

Voyage au centre de la terre on Wikipedia
Read the original French version Voyage Extraordinaire on Gutenberg here
Read the 55th edition in French here

Read about Jules Verne on Wikipedia
Geological Evidences of the Antiquity of Man (1863) inspired Verne to write Journey
Read the Antiquity of Man at Google Books here

First English translation (1971)
Read the Griffith and Farran (1871) 1st translation (altered and abridged) to English here
Listen on Gutenberg here (1871 translation)

2nd English translation (1877)
Read the Ward, Lock & Co. Ltd. (1877) 2nd translation (most faithful) to English here
Read the Forgotten Books edition in English here
Buy the most recent (2008) version of Ward, Lock & Co.'s translation from A.D. Classic here
Read the Preface to the Ward, Lock & Co (1877) translation by Frederick Amadeus Malleson here
Listen on Gutenberg here (1877 translation)
Listen on Books Should Be Free here

On the translations
Read "Journey Without End: On Translating Verne", William Butcher, reprinted from Babel, here
"Jules Verne's English Translations" (Science Fiction Studies, vol 32, p. 80, 2005) affirms the very low quality of translations from the French and the exclusion of much of the science of the stories.  Read abstract here
Read "Journey to the Centre of the Text. On translating Verne", William Butcher in Babel here

For more background and connections, read Wapedia here

More...
See a few select chapters from the graphic novel "Journey to the Center of the Earth" by Fiona MacDonald here.  There are two excellent additions included at the end:  a map of the travels and science and technology during Verne's time