| 413,413 | Countries with the Longest Coastlines |
| 164,376 | Draw All Country Borders and Borderless Countries |
| 157,456 | Seas of the World |
| 138,523 | Top 10 European Countries by Coastline |
| 137,062 | World's Longest Rivers |
| 135,553 | Seas on the World Map |
| 116,078 | Countries That Touch the Baltic Sea |
| 115,987 | Name a Valid Country Bordering Each Sea |
| 115,662 | Five Countries with the Longest Coastline by Continent |
| 105,071 | Famous Rivers |
| 101,053 | Countries with Fjords |
| 100,826 | 100 Rivers on a World Map |
| 96,919 | Seas that Touch the Most Countries |
| 96,525 | Top 10 Asian Countries by Coastline |
| 92,580 | American Countries With No Atlantic Coastline |
| 91,778 | Landforms Fill in the Blank |
| 89,745 | Biggest Lakes in the World |
| 88,471 | Top 10 American Countries by Coastline |
| 87,965 | World's Longest Rivers on a Map |
| 87,499 | North Sea Countries |
| 84,727 | Seas of Europe |
| 83,906 | Natural Features of Countries #1 |
| 81,721 | Tectonic Plates Map Quiz |
| 78,972 | Trace the Coast of Europe with a Map |
| 76,926 | Countries With No Rivers |
| 75,594 | Bay of Bengal Countries With an Empty Map |
| 74,814 | Countries Farthest From the Sea |
| 72,141 | Bodies of Water by Satellite Image #1 |
| 71,191 | Countries That Touch the Adriatic Sea |
| 70,819 | U.S. Cities with Landforms in The Name |
| 67,284 | Countries with the Shortest Coastlines |
| 66,938 | Countries Closest to the Aegean Sea |
| 66,529 | African Great Lakes |
| 66,350 | Rivers of the United States |
| 65,647 | 100 Longest Rivers in Europe - with a Map |
| 65,456 | Countries That Touch the Red Sea |
| 63,553 | Caspian Sea Countries |
| 62,296 | Name a Valid Country on Each River |
| 60,824 | African Great Lake Countries with an Empty Map |
| 60,654 | Black Sea Countries |
| 59,524 | Trace the Coast of Afro-Eurasia with a Map |
| 57,756 | South China Sea Countries |
| 57,734 | Capital Cities by Body of Water |
| 56,585 | Rivers of Europe Quiz |
| 56,066 | Mississippi River States Empty Map Quiz |
| 55,907 | Trace the Coast of the World Map |
| 55,898 | Trace the Coast of the Americas with a Map |
| 53,328 | Mekong River Countries Empty Map Quiz |
| 52,885 | Biggest City by River |
| 52,475 | Bodies of Water on the World Map |
| 51,984 | Landforms by Country |
| 50,861 | Top 10 U.S. States with the Longest Coastline |
| 50,765 | Nile River Basin Countries on a Map |
| 50,573 | Layers of the Earth and Atmosphere |
| 50,494 | Great Lakes Quiz |
| 50,479 | Movies with Landforms in the Name |
| 49,030 | Sea in the Answers |
| 48,345 | Capitals by River |
| 47,951 | Top 10 African Countries by Coastline |
| 45,606 | Rivers and Lakes whose Names are Countries |
| 44,609 | Cities on a Map of the Great Lakes |
| 40,390 | Rivers that Flow through the Most Countries |
| 40,061 | Geological Extremes |
| 39,748 | Most Populous River Basins |
| 39,652 | Major U.S. Rivers with State Names |
| 39,372 | Amazon... or Nile? |
| 39,239 | 10 Longest Rivers in the United States |
| 38,299 | Draw the Coast of the Mediterranean on the Map |
| 38,094 | 50 Rivers on a World Map |
| 37,543 | Natural Features of Countries #2 |
| 36,120 | Bodies of Water around the Arabian Peninsula |
| 35,864 | City to River #1 |
| 35,752 | Tectonic Plates on a Map |
| 35,564 | Asian Physical Geography |
| 33,542 | European Physical Geography |
| 33,336 | Rivers in History |
| 32,802 | Rivers A-Z |
| 32,450 | Countries with the Most Lakes Over 100 Km² |
| 31,744 | African Physical Geography |
| 31,741 | Rivers by City |
| 30,510 | UK Rivers Map Quiz |
| 30,305 | Gulfs and Bays on the World Map |
| 30,035 | Largest Lakes in the United States on a Map |
| 29,063 | Countries with the Longest Coastline Bordering Each Other |
| 28,916 | States and Provinces that Touch the Great Lakes |
| 28,657 | Bodies of Water by Cities |
| 28,016 | Trace the Coast and International Borders of the USA |
| 26,859 | U.S. States by Landform Quiz |
| 26,755 | Name the Sea from a Clue |
| 26,570 | Cities on the Mediterranean Sea by a Clue |
| 26,117 | City to River #2 - Difficult |
| 26,026 | Landforms by Description Quiz |
| 25,069 | The Five Oceans Map Quiz |
| 24,030 | Famous Lakes Quiz |
| 23,460 | Countries by Coastline Per Capita |
| 23,148 | Countries Bordering the Four Color Seas |
| 22,752 | Texas Rivers Map Quiz |
| 22,711 | Rivers on Borders |
| 22,258 | Indian Ocean General Knowledge |
| 21,443 | Terrestrial Biomes - Map Quiz |
| 21,259 | Atlantic Ocean General Knowledge |
| 21,170 | U.S. States with Shortest Maximum Distances to the Ocean |
| 21,131 | U.S. State Capitals Closest to the Great Lakes |
| 19,731 | Bodies of Water by Satellite Image #2 |
| 19,227 | Lakes in the United States by Clue |
| 18,402 | U.S. State Capitals Closest to the Mississippi River |
| 18,367 | South American Physical Geography |
| 18,273 | U.S. States Bordering the Great Lakes |
| 17,288 | Human Biology Multiple Choice Quiz #2 |
| 16,040 | Largest Rivers by Discharge |
| 14,997 | U.S. States by Five Longest Rivers |
| 13,819 | Longest Rivers in the UK |
| 12,700 | Oceania Physical Geography |
| 11,775 | Human Biology Multiple Choice Quiz #1 |
| 11,031 | Huge List of Famous Lakes |
| 10,036 | Geologic Time Scale |
| 9,778 | 100 Longest Rivers in North America - with a Map |
| 8,698 | Which Great Lake? – Click Quiz |
| 8,065 | Seas of the World - Map Quiz |
| 7,212 | Straits on the World Map |
| 6,812 | Ultimate Rivers of the UK (with map) |
| 6,454 | Great Lakes - Map Quiz |
| 5,853 | Longest U.S. Rivers on a Map |
| 5,564 | European Bodies of Water (with Map!) |
| 5,318 | Five Countries with the Shortest Coastline by Continent |
| 4,895 | 100 Longest Rivers in the World - with a Map |
| 4,663 | 25 Largest Bodies of Water |
| 4,640 | Baltic Sea Countries with an Empty Map |
| 4,386 | US States along the coastline and border |
| 4,344 | 100 Longest Rivers in South America - with a Map |
| 4,314 | 100 Longest Rivers in Africa - with a Map |
| 4,216 | Countries with a Longer Coastline than Their Neighbors |
| 4,101 | Largest River Basins by Area on a Map |
| 3,989 | 100 Longest Rivers in Asia - with a Map |
| 3,984 | Trace the coast of the world (Hard(no map)) |
| 3,957 | Oregon Rivers - Map Quiz |
| 3,949 | River Deltas on the Map |
| 3,850 | German Rivers on a Map |
| 3,789 | Trace the Coast of Europe by Guessing the Biggest Cities |
| 3,710 | Major Rivers of the World - Source US Dept of Commerce, NOAA |
| 3,664 | Countries Closest to the Red Sea |
| 3,512 | They’re Rocks - Sudden Death |
| 3,367 | Peninsulas A-Z |
| 3,141 | Longest Rivers - Sudden Death |
| 3,078 | Name a Valid Country on Each River |
| 3,038 | UK Cities, Towns & their Rivers (with map) |
| 2,972 | 50 Longest Rivers in the World |
| 2,914 | 100 Biggest Natural Lakes in Europe with a Map |
| 2,890 | Danube River Basin Countries on a Map |
| 2,819 | World's Dirtiest Rivers |
| 2,787 | Geologic Eons, Eras and Periods |
| 2,769 | Five Longest Rivers by Continent |
| 2,746 | Biggest countries with the smallest coastline |
| 2,727 | World's Longest Rivers |
| 2,682 | European Rivers - Sudden Death |
| 2,643 | Biology General Knowledge |
| 2,620 | Famous Lakes on a World Map |
| 2,612 | 50 Largest Lakes in the World Quiz |
| 2,501 | Flags of Countries That Border the North Sea |
| 2,351 | Biology General Knowledge #3 |
| 2,348 | Countries Bordering the Aegean Sea - Map Quiz |
| 2,325 | Sequential US Rivers and Cities |
| 2,318 | Rivers in the Map of Europe |
| 2,214 | Countries that Touch the Most Seas |
| 2,213 | Landlocked Countries Whose Only Borders are with Countries With Coastlines |
| 2,188 | Bodies of Water in History |
| 2,158 | Rivers of Great Britain |
| 2,132 | Rivers - Sudden Death |
| 2,112 | Mainland Countries With the Shortest Coastlines |
| 2,101 | Longest rivers in Poland |
| 2,101 | Seas - Sudden Death |
| 2,077 | Longest Rivers in Countries |
| 2,068 | Largest Deserts |
| 2,024 | Seas on the Map of Europe |
| 2,012 | Name a Valid River |
| 1,985 | Countries with Two or More Coastlines |
| 1,975 | Seas of the World (hard) |
| 1,942 | Countries with shortest coastline |
| 1,893 | Fill the world map by naming rivers |
| 1,890 | Countries with multiple coastlines |
| 1,888 | Countries With Highest Coast-to-Land-Border Ratio |
| 1,887 | 100 Longest Rivers in Oceania - with a Map |
| 1,830 | Countries with Longest Maximum Distances to the Ocean |
| 1,805 | 100 Seas of the World by Bordering Sea in 30 seconds |
| 1,789 | Countries with the longest Total Borders and Coastline |
| 1,787 | Cross the River |
| 1,761 | Rivers by Country |
| 1,712 | Countries Bordering the Indian Ocean Empty Map Quiz |
| 1,659 | Mississippi Basin Rivers on a Map - Extreme |
| 1,611 | Five Biggest Countries by Sea |
| 1,562 | World Rivers Map Quiz |
| 1,556 | Countries with the Most Volcanoes |
| 1,546 | Countries with the most long rivers |
| 1,540 | Biggest World Cities on Lakes |
| 1,525 | Mississippi-Missouri Basin States and Provinces |
| 1,499 | Rivers of Russia |
| 1,438 | Sequential Cities in the Nile River Basin |
| 1,408 | 40 Lakes on the World Map |
| 1,400 | Countries with less than 100km of Coastline |
