A vasectomy kit, a harpoon gun, false teeth, and six full-sized mannequins are just a few of the many strange things that passengers have left behind.

TRAINS
Europe’s largest engineering project uncovered countless historic treasures, ranging from bones to Tudor bowling balls.
The rock icon is also a huge model train nerd, and he's selling off some of his collection.
You can catch colorful autumn colors from special observatory train cars this fall on Amtrak.
Avoiding long stretches of tunnels just got easier for London commuters.
Take the world's longest escalator to the longest flight to the longest subway to the longest bridge.
Transit Explorer maps North America’s “fixed-guideway transit” options, like subways, streetcars, commuter trains, and bus-rapid transit.
In 1896, two locomotives traveling more than 50 miles per hour smashed into each other. On purpose.