| 402,638 | Countries with the Longest Coastlines |
| 151,832 | Draw All Country Borders and Borderless Countries |
| 142,835 | Seas of the World |
| 134,087 | Top 10 European Countries by Coastline |
| 128,543 | Seas on the World Map |
| 115,373 | World's Longest Rivers |
| 114,074 | Countries That Touch the Baltic Sea |
| 110,829 | Five Countries with the Longest Coastline by Continent |
| 108,961 | Name a Valid Country Bordering Each Sea |
| 101,916 | Famous Rivers |
| 93,578 | Top 10 Asian Countries by Coastline |
| 93,576 | Seas that Touch the Most Countries |
| 89,422 | 100 Rivers on a World Map |
| 89,312 | American Countries With No Atlantic Coastline |
| 86,663 | Biggest Lakes in the World |
| 86,491 | Top 10 American Countries by Coastline |
| 83,855 | North Sea Countries |
| 82,647 | World's Longest Rivers on a Map |
| 81,783 | Seas of Europe |
| 73,977 | Trace the Coast of Europe with a Map |
| 73,471 | Bay of Bengal Countries With an Empty Map |
| 73,135 | Countries With No Rivers |
| 71,713 | Countries Farthest From the Sea |
| 69,008 | Countries That Touch the Adriatic Sea |
| 67,905 | Bodies of Water by Satellite Image #1 |
| 65,595 | Countries with the Shortest Coastlines |
| 63,409 | Countries That Touch the Red Sea |
| 61,603 | Rivers of the United States |
| 61,238 | Caspian Sea Countries |
| 61,224 | 100 Longest Rivers in Europe - with a Map |
| 60,332 | African Great Lakes |
| 59,009 | Black Sea Countries |
| 58,936 | African Great Lake Countries with an Empty Map |
| 57,641 | Countries Closest to the Aegean Sea |
| 56,918 | Name a Valid Country for Each River |
| 56,330 | South China Sea Countries |
| 56,254 | Trace the Coast of Afro-Eurasia with a Map |
| 55,713 | Capital Cities by Body of Water |
| 53,622 | Mississippi River States Empty Map Quiz |
| 52,224 | Trace the Coast of the Americas with a Map |
| 52,169 | Rivers of Europe Quiz |
| 51,905 | Biggest City by River |
| 51,807 | Trace the Coast of the World Map |
| 51,254 | Mekong River Countries Empty Map Quiz |
| 49,984 | Top 10 U.S. States with the Longest Coastline |
| 48,474 | Great Lakes Quiz |
| 48,208 | Nile River Basin Countries on a Map |
| 47,791 | Capitals by River |
| 47,217 | Top 10 African Countries by Coastline |
| 46,379 | Sea in the Answers |
| 43,399 | Bodies of Water on the World Map |
| 43,369 | Rivers and Lakes whose Names are Countries |
| 43,004 | Cities on a Map of the Great Lakes |
| 38,929 | Rivers that Flow through the Most Countries |
| 38,691 | Most Populous River Basins |
| 38,234 | Major U.S. Rivers with State Names |
| 37,758 | Amazon... or Nile? |
| 37,129 | 10 Longest Rivers in the United States |
| 35,777 | Draw the Coast of the Mediterranean on the Map |
| 34,961 | Bodies of Water around the Arabian Peninsula |
| 32,504 | 50 Rivers on a World Map |
| 32,122 | Rivers A-Z |
| 29,270 | UK Rivers Map Quiz |
| 28,606 | Gulfs and Bays on the World Map |
| 28,561 | States and Provinces that Touch the Great Lakes |
| 28,491 | Countries with the Most Lakes Over 100 Km² |
| 27,714 | Bodies of Water by Cities |
| 26,752 | Trace the Coast and International Borders of the USA |
| 25,924 | Name the Sea from a Clue |
| 25,856 | Cities on the Mediterranean Sea by a Clue |
| 25,473 | City to River #1 |
| 24,741 | Rivers in History |
| 24,330 | The Five Oceans Map Quiz |
| 24,151 | Countries with the Longest Coastline Bordering Each Other |
| 23,475 | Famous Lakes Quiz |
| 23,335 | Largest Lakes in the United States on a Map |
| 22,609 | Texas Rivers Map Quiz |
| 22,319 | Rivers on Borders |
| 22,072 | Rivers by City Quiz |
| 21,701 | Indian Ocean General Knowledge |
| 21,205 | Countries by Coastline Per Capita |
| 21,127 | Countries Bordering the Four Color Seas |
| 20,654 | Atlantic Ocean General Knowledge |
| 20,488 | U.S. State Capitals Closest to the Great Lakes |
| 18,992 | Bodies of Water by Satellite Image #2 |
| 18,970 | Lakes in the United States by Clue |
| 18,227 | U.S. States with Shortest Maximum Distances to the Ocean |
| 18,095 | City to River #2 - Difficult |
| 17,828 | U.S. States Bordering the Great Lakes |
| 17,608 | U.S. State Capitals Closest to the Mississippi River |
| 15,393 | Largest Rivers by Discharge |
| 13,484 | Longest Rivers in the UK |
| 11,441 | U.S. States by Five Longest Rivers |
| 8,512 | 100 Longest Rivers in North America - with a Map |
| 7,382 | Seas of the World - Map Quiz |
| 7,368 | Which Great Lake? – Click Quiz |
| 6,305 | Great Lakes - Map Quiz |
| 6,198 | Ultimate Rivers of the UK (with map) |
| 6,103 | Straits on the World Map |
| 5,025 | Five Countries with the Shortest Coastline by Continent |
| 5,010 | European Bodies of Water (with Map!) |
| 4,904 | Longest U.S. Rivers on a Map |
| 4,394 | Baltic Sea Countries with an Empty Map |
| 4,307 | US States along the coastline and border |
| 3,958 | Largest River Basins by Area on a Map |
| 3,858 | Oregon Rivers - Map Quiz |
| 3,847 | Trace the coast of the world (Hard(no map)) |
| 3,698 | Countries with a Longer Coastline than Their Neighbors |
| 3,689 | Major Rivers of the World - Source US Dept of Commerce, NOAA |
| 3,675 | Trace the Coast of Europe by Guessing the Biggest Cities |
| 3,620 | 100 Longest Rivers in South America - with a Map |
| 3,603 | 100 Longest Rivers in the World - with a Map |
| 3,533 | German Rivers on a Map |
| 3,530 | 100 Longest Rivers in Africa - with a Map |
| 3,516 | Countries Closest to the Red Sea |
| 3,293 | 100 Longest Rivers in Asia - with a Map |
| 3,100 | River Deltas on the Map |
| 2,845 | 50 Longest Rivers in the World |
| 2,770 | World's Dirtiest Rivers |
| 2,716 | Danube River Basin Countries on a Map |
| 2,703 | World's Longest Rivers |
| 2,697 | 100 Biggest Natural Lakes in Europe with a Map |
| 2,670 | Biggest countries with the smallest coastline |
| 2,598 | Name a Valid Country on Each River |
| 2,551 | UK Cities, Towns & their Rivers (with map) |
| 2,547 | Five Longest Rivers by Continent |
| 2,359 | Longest Rivers - Sudden Death |
| 2,327 | Flags of Countries That Border the North Sea |
| 2,291 | Famous Lakes on a World Map |
| 2,282 | European Rivers - Sudden Death |
| 2,260 | 50 Largest Lakes in the World Quiz |
| 2,236 | Rivers in the Map of Europe |
| 2,215 | Countries Bordering the Aegean Sea - Map Quiz |
| 2,161 | Landlocked Countries Whose Only Borders are with Countries With Coastlines |
| 2,148 | Countries that Touch the Most Seas |
| 2,126 | Sequential US Rivers and Cities |
| 2,090 | Rivers of Great Britain |
| 2,075 | Longest rivers in Poland |
| 2,030 | Longest Rivers in Countries |
| 1,971 | Mainland Countries with the Shortest Coastlines |
| 1,951 | Seas on the Map of Europe |
| 1,917 | Countries with Two or More Coastlines |
| 1,889 | Countries with shortest coastline |
| 1,890 | Name a Valid River |
| 1,864 | Rivers - Sudden Death |
| 1,800 | Seas - Sudden Death |
| 1,761 | Countries with multiple coastlines |
| 1,755 | Countries with the longest Total Borders and Coastline |
| 1,754 | Countries with Longest Maximum Distances to the Ocean |
| 1,736 | Cross the River |
| 1,732 | Rivers by Country |
| 1,701 | Fill the world map by naming rivers |
| 1,688 | 100 Seas of the World by Bordering Sea in 30 seconds |
| 1,620 | Countries Bordering the Indian Ocean Empty Map Quiz |
| 1,604 | 100 Longest Rivers in Oceania - with a Map |
| 1,537 | Mississippi Basin Rivers on a Map - Extreme |
| 1,531 | World Rivers Map Quiz |
| 1,513 | Three Real and One Fake - Friends |
| 1,465 | Countries with the most long rivers |
| 1,461 | Rivers of Russia |
| 1,459 | Biggest World Cities on Lakes |
| 1,433 | Mississippi-Missouri Basin States and Provinces |
| 1,401 | Countries with Highest Coast-to-Land Border Ratio |
| 1,367 | Countries with less than 100km of Coastline |
| 1,357 | Seas of the World (hard) |
| 1,351 | Sequential Cities in the Nile River Basin |
| 1,339 | All Mediterranean seas |
| 1,332 | Multiple Capitals on Rivers |
| 1,316 | Groups of Countries By Bordering Sea #1 |
| 1,307 | 40 Lakes on the World Map |
| 1,292 | Seas of the World |
| 1,253 | Croatian rivers |
| 1,247 | Small Countries with the Most Coastline - with Exceptions |
| 1,240 | Lakes A-Z |
| 1,226 | Most Populous Countries by Bordering Sea |
| 1,220 | Baltic Sea General Knowledge |
| 1,192 | Countries by River |
| 1,178 | Countries without coastline |
| 1,165 | Cities in the Colorado River Basin on a Map |
| 1,133 | British Rivers to Cities — Click Quiz #1 |
| 1,133 | Ultimate "Lake" Geography Quiz |
| 1,115 | Name a Valid Sea |
| 1,111 | Caribbean Sea General Knowledge |
| 1,105 | Five Countries With the Longest Coastline by Continent |
| 1,099 | Countries named after rivers |
| 1,095 | Biggest rivers in the world by drainage basins area |
| 1,093 | Longest Rivers in the US |
| 1,088 | Huge List of U.S. Bodies of Water |
| 1,074 | Largest Countries with the Least Coastline |
| 1,073 | Answers Contain "Bay" |
| 1,056 | Three Biggest Cities by Body of Water |
| 1,052 | Black Sea Cities on a Map |
| 1,050 | Five Biggest Countries by Sea |
| 1,041 | 50 Biggest Cities along the Rhine River with a Blank Map |
| 1,032 | Largest River Basins of Europe on a Map |
| 1,017 | Countries with the Most Long Rivers |
| 1,012 | River Mouths on the Map |
| 1,004 | Countries that Block Other Countries from Water |
| 934 | Arctic Ocean General Knowledge |
| 931 | Black Sea General Knowledge |
