Oxford University

Tolkien took a position at Oxford University, where he would eventually give his lecture Beowulf: The Monster and the Critics.  While there he also formed a social group called The Inklings, referencing the fact that everyone in the group were writers, with one notable member being C.S. Lewis.  Tolkien published several other works during this time, including the poem The Adventures of Tom Bombadil in the Oxford Magazine.

The River Somme

The River Somme is a river in France where the Somme Offensive took place in World War I.  Tolkien was a soldier deployed to the front lines of the Somme.  After a few months in and out of trenches he was sent home to Britain with Trench Fever.

Zermatt, Switzerland

While on his trip through Switzerland, Tolkien stayed in Zermatt, which is near the Matterhorn mountain.  It is thought that the view from where he stayed would eventually serve as the inspiration for the Misty Mountain in The Hobbit.

Cambridge

Historically, Cambridge University in Cambridge, England, was generally considered the second-best university in the country, after Oxford, which its founders split from ca. 1209.  (Enyclopedia)

Bloemfontein, South Africa

Tolkien was born in Bloemfontein, South Africa.  His father and mother moved there before he was born.  His father worked as a banker and moved to South Africa as the positions there offered a better chance for promotion.  Tolkien was born here on January 3rd, 1892 and his family moved back to Britain after his father died in 1896.