Because rail gauges (the spaces between tracks) may vary from country to country, international train travel sometimes involves a "bogie exchange," in which a train car — with passengers inside! — is lifted off the wheel assembly, or bogie, so the bogie can be swapped out for one of a different gauge. Trains traveling from Bucharest, Romania, to Chisinau, Moldova, have a bogie exchange in Ungheni, Moldova. A rail journey between Beijing and Ulaanbaatar, Mongolia, includes a three-hour stop for a bogie exchange in Erlian, China.

Which country has the most international land borders?

A) Brazil

B) China

C) India

D) Russia

Previous answer: In exchange for pardons for criminal activities, the pirate Jean Lafitte joined his forces with Gen. Andrew Jackson's to defend New Orleans during the War of 1812.

TRIVIA FANS: Leslie Elman is the author of "Weird But True: 200 Astounding, Outrageous and Totally Off the Wall Facts." Contact her at [email protected].