World Executive - For the best of the world's most populer cities, visit Open World's City Guides.

Cities of the world - To search database of 1583 city guides in 128 different countries.

City Population - the largest cities in the world english/german - On these web pages, you'll find statistics and maps about the population of the major agglomerations of the world. For many countries, information about the population of their administrative areas and the principal cities is provided.

Greatest Cities of the World english - Greatest Cities of the World - reference information, travel guide, general info, metropolitan areas, government, economy, industry, population, education & culture, colleges & universities, sights & points of interest, parks & recreation, ancient & modern history, contemporary issues.

Official City Sites english - Directory of official city, county, state and country sites from Australia, Canada, United Kingdom and United States. Also includes chamber of commerce and visitor bureau sites.

Cybercityguides - Hotels and Travel english - Comprehensive guide to many cities across the globe including hotels, attractions, maps and more.