When traveling to another country where and how do you get more info?

We are starting tours in South Africa and would like some advice as to where we can adverstise. Any specific agencies, websites that you like to visit? When looking for more information on such subjects on a search engine, what do you type as your search criteria.
What agencies in America also provide information (to americans) regarding tours and accommodation in other countries.

expedia.com

Brainrotting: Episode 4 – Washington to California, BMW F650 GS adventure motorcycling travel tours

Globetrotter South America Travel Map $8.05 Globetrotter South America Travel Map

Film + Travel North America, South America $12.76 Film + Travel North America, South America

World Travel : South America $5.47 Buy and sell [World Travel : South America] at great prices.

New Orleans Sightseeing Tour $27.5 Travel Through Three Centuries of New Orleans history, legends and romance. See the “Big Easy” in comfort and learn why it is called the Queen City of the South.

South America – South Insight Travel Map $4.67 Buy and sell [South America - South Insight Travel Map] at great prices.

Tijuana Mexico Shopping Trip with Gray Line Transportation $63 Travel with Gray Line to Tijuana, Mexico, “South of the Border”, for a day in beautiful Baja, California! Tour includes a ride along California’s coastline, lunch in Tijuana and shopping in the heart of this Mexican city!

Tijuana with San Diego Gray Line Transportation $34 South of the Border fun! Travel with Gray Line Transportation across the border to Tijuana, Mexico. A professional guide will give you pointers on shopping and dining. See points of interest like the Avenue of the Heros and the oldest Jai Alai Palace.

Travel The World By Train: South America $57.95 Buy and sell [Travel The World By Train: South America] at great prices.

Lonely Planet Healthy Travel Central & South America $7.19 Lonely Planet Healthy Travel Central & South America

Antique Nightime Car Tours of San Francisco $40 Discover San Francisco in comfort and style! Mr. Toad’s Tours takes you on a journey through the city’s most famous sites in a fantastic antique car. Climb aboard and enjoy a personal, informative 80 minute tour of one of America’s most distinctive cities.