Twoflower (Wikipedia)
Twoflower is a native of the Agatean Empire, on the Counterweight Continent, living in the major sea port of Bes Pelargic where he works as an “inn-sewer-ants” clerk where he calculates the level of insurance premiums. The first tourist ever on the Discworld, he wrote “What I did on my Holidays” after his return to the Empire.- Mare Crisium (Wikipedia)
Mare Crisium /ˈkrɪsiəm/ (Latin crisium, the “Sea of Crises”) is a lunar mare located in the Moon’s Crisium basin, just northeast of Mare Tranquillitatis. Mare Crisium is a basin of Nectarian age.