马克·吐温关于旅游的经典语录主要包括以下内容：

核心名言

"Travel is the best way to eliminate ignorance and hatred."（旅行是消除无知和仇恨的最好方法）

其他经典语录

- "A lie can travel halfway around the world while the truth is still putting on its shoes."（当真理还正在穿鞋的时候，谎言就能走遍半个世界）

- "The truth is like a sudden horseshoe to the head, it hurts."（迟来的真相，就像突然击中头部的马蹄铁，哎，痛啊!）

- "Imagination is like a living dead； without it, one can exist, but not truly live."（当幻想没有了以后，你还可以生存，但是你虽生犹死）

- "The world is a book, and those who do not travel read only one page."（世界是本书，不从旅行获得充足，而是为了心灵获得休息）

幽默故事中的语录

- 在法国旅行时，因未购入场券被迫站立听演讲的幽默经历：

"And so I had to stand and listen to his speech from beginning to end, because there were no empty seats."（所以我就不得不从头到尾站着听了，因为那里不会有空座位）

- 关于苍蝇的幽默比喻：

"A mother fly with two sons loved them dearly. One day, a little fly tasted some delicious candy and fell dead. It was only a contrast with something unpleasant."（一只母苍蝇有两个儿子，她视若掌上明珠。一天，一只小苍蝇品尝糖果后死亡，只是与不愉快事物形成对比）

这些语录和故事展现了马克·吐温对旅行、真理与幽默的独特见解，至今仍被广泛引用。