Tourist
Sightseer
noun
Sightseeing (観光) guests are tourists and sightseers.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Will help to know 観光 as well.
この町には毎年多くの観光客が訪れます。
Many tourists visit this town every year.
このツアーは観光客にとても人気があります。
This tour is very popular among tourists.
その観光客は、アメリカで医者の診断書をもらうために50ドルを支払わなければならなかった。
The tourist had to pay $50 to get a doctor’s note in the U.S.