Bing found the following results
Colombo - Wikipedia
Colombo | Sri Lanka, Map, Population, & Facts | Britannica
10+ Incredible Things To Do In Colombo (+ Where To Eat) | The …
31 Facts about Colombo - Facts.net
Sri Lanka - United States Department of State
Colombo - New World Encyclopedia
20 BEST Things to do in Colombo, Sri Lanka
U.S. Embassy Colombo, Sri Lanka - CLM - Travel
Where is Colombo Located | Visit Colombo
Colombo – Travel guide at Wikivoyage