行 (xíng) can mean "journey" or "travel" when used as a noun in literary or formal Chinese. It often appears in compound expressions and classical-style prose. In modern Chinese, it is more commonly seen in set phrases and titles rather than standalone usage.
这次黄山之行让我终生难忘。
Zhè cì Huángshān zhī xíng ràng wǒ zhōngshēng nánwàng.
This trip to Huangshan is something I will never forget for the rest of my life.
一路上风景如画,真是一次愉快的行。
Yīlù shàng fēngjǐng rúhuà, zhēnshi yī cì yúkuài de xíng.
The scenery along the way was picturesque — it was truly a pleasant trip.
他在书中记录了自己的西域之行。
Tā zài shū zhōng jìlù le zìjǐ de Xīyù zhī xíng.
He recorded his journey to the Western Regions in his book.