One of the productive uses of books like this, beyond serving an idle curiosity, is the discovery of works that often go unreferenced and to which one's reading might never lead. I found three.
The first is the travel diary of Ahmad Ibn Fadlan. Ahmad was sent by the ruler of the Abbasid Empire (circa 921 CE) on an embassy to the Bulgars on the Volga River. He traveled from Central Asia to what is now Russia, and his journal is best known for its graphic account of the customs of the Rus. These were the early Vikings and what a well-educated Islamic scholar might have to say about what he saw could, to me at least, prove interesting.
The second is the diary of Alice James, sister of Henry and William. She suffered from debilitating mental issues - then diagnosed as hysteria - and apparently produced writings that are "unsparing" in their self-analysis.
The third is more of a lark - the whaling diary of Sir Arthur Conan Doyle, who somehow found himself voyaging to the Arctic as a ship's surgeon. He tumbled into the sea three times on his six-month journey and is said to have produced a vivid and intensely detailed account of life on the hunt in the polar regions.
The compendium is extensive and ordered chronologically, from the Pharaohs to Kurt Cobain. The more esteemed journals receive the most attention (Leonardo, Magellan, Pepys, Linnaeus, Cook and Von Humboldt among them). There are photographs aplenty. All continents, it seems, are covered and a number of professions - primarily artists, scientists, soldiers, writers and explorers. It's a fine large book, if a bit basic. Should historical insights be of interest, there's a lot here to appeal.