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                                          Cathedral of Notre-Dame, Paris, France.    
                              
          26 Historic Buildings to Visit the Next Time You’re in Paris
                  
                  
                                          Courtyard of the medieval hospital of Saint-Esprit, now the Hotel Dieu, Beaune, France.    
                              
          6 Significant Hospitals
                  
                  
                                          Xi'an clay terracota soldiers, China. Terracotta Army inside the Qin Shi Huang Mausoleum, 3rd century BCE.    
                              
          21 Tombs Around the World
                  
                  
                                          Salt mines Salinas de Maras, Cusco, Peru. Altiplano in South America. Maras town in the Sacred Valley of the Incas. salt evaporation up-slope ponds    
                              
          10 Mines That Aren’t Just Holes in the Ground
                  
                  
                                          Caption: French troops are being relieved by fresh troops at Verdun. View shows horses lined up in front of shelters, ca. 1914-1918. (World War I)    
                              
          5 Surprisingly Fascinating Forts in France
                  
                  
                                          Johann Wolfgang von Goethe's House, Weimar,Germany; photocrom print published between 1890-1900.    
                              
          5 Historically Significant Houses in Germany
                  
                  
                                          The exterior of the Victoria terminus railway station, Mumbai, India. (Chhatrapati Shivaji Terminus, UNESCO World Heritage site)    
                              
          5 Transit Stations Worth Seeing
                  
                  
                                          Sforzesco Castle, Milan.    
                              
          6 Stately Castles in Italy
                  
                  
                                          Cologne. Cologne Cathedral. Aerial Cologne, Germany. Roman Catholic church on the Rhine river by Hohenzollern Bridge (right), eclipses all other historic buildings. Largest Gothic church in northern Europe. UNESCO World Heritage site, Gothic architecture    
                              
          5 Spectacular Churches in Germany
                  
                  
                                          Pre-historic cave painting in the Lascaux cave in Montignac, France    
                              
          11 Caves That Made History
                  
                  
                                          Water droplets on flat surface.    
                              
          Water Explained in 5 Questions
                  
                  
                                          Giacomo della Porta. The Fountain of Neptune also known as the Calderari fountain in the northern end of Piazza Navona. The basins are work of Giacomo della Porta. The statue of Neptune by Antonio Della Bitta was added in 1878.    
                              
          4 Fountains in Italy (and 1 in England)
                  
                  
                      
                  
                          
                  
                                          Ancient ruins of the Library of Celsus, with the Gate of Mazeus and Mithridates on right which serves as the south gate to the Agora at Ephesus, near Selcuk, Turkey.    
                              
          6 Notable Libraries
                  
                  
                                          Exterior of Wrigley Field Home of the Chicago Cubs. Chicago Cubs Wrigley Field Chicago, IL. National League baseball stadium. Major League Baseball (MLB). Baseball stadium.    
                              
          7 Significant Stadiums
                  
                  
                                          The Pond Gardens, Hampton Court palace and garden, London, England. (horizontal)    
                              
          9 Palaces in England
                  
                  
                                          Nativity facade of Sagrada Familia cathedral in Barcelona, Spain. Cathedral of La Sagrada Familia, designed by Antonio Guadi.    
                              
          10 Iconic Churches in Spain
                  
                  
                                          Transmission electron microscope image shows SARS-CoV-2-also known as 2019-nCoV, the virus that causes COVID-19 (coronavirus) - isolated from a patient in the U.S. Virus particles are shown emerging from the surface of cells cultured in the lab. Spikes...    
                              
          COVID-19 in 20 Questions
                  
                  
                                          Gutzon Borglum. Presidents. Sculpture. National park. George Washington. Thomas Jefferson. Theodore Roosevelt. Abraham Lincoln. Mount Rushmore National Memorial, South Dakota.    
                              
          9 Memorials and Monuments in the United States
                  
                  
                                          Milan Cathedral Against Sky During Sunset, Italy    
                              
          19 Essential Italian Churches
                  
                  
                                          Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.    
                              
          5 Remarkably Close U.S. Presidential Elections
                  
                  
                                          Shadow of a man holding large knife in his hand inside of some dark, spooky buiding    
                              
          7 of History's Most Notorious Serial Killers 
                  
                  
                                          All Saints Day. All Souls Day. Candles in cemetery in Poland on All Saints Day, November 1. All Souls Day, November 2. Christian church, All Hallows, Solemnity of All Saints, Feast of All Saints, purgatory, Roman Catholic church    
                              
          7 Unique Burial Rituals Across the World
                  
                  
                                          Portrait of western lowland gorilla (Gorilla gorilla gorilla), Bayanga, Central African Republic    
                              
          Gorilla gorilla, Sula sula, and Other Animals Whose Names Are Tautonyms—the Same for Genus and Species
                  
                  
                                          Meeting of leaders in W.W.I, General Hindenburg, Kaiser William II, General Ludendorff examine maps during World War I in Germany.    
                              
          Military Commanders of World War I
                  
                  
                      
                  
              
              
                      
                          
                              
          Featured Lists
                              
                                  
                                                              American troops at the front in Italy. American soldiers on the Piave (river) front hurling a shower of hand grenades into the Austrian trenches, Varage, Italy; September 16, 1918. (World War I)    
                              
          Leaders of World War I
                      
          Learn more about the leaders of World War I.
                  
                                  
                                                              French infantry coming into position at the Marne during World War I, 1914-18.    
                              
          Battles of World War I
                      
          From Amiens to Ypres
                  
                                  
                              
                                  
                                                              German machine gunners occupy a trench during World War I.    
                      
          Weapons of World War I
                  
                                  
                                                              Meeting of leaders in W.W.I, General Hindenburg, Kaiser William II, General Ludendorff examine maps during World War I in Germany.    
                      
          Military Commanders of World War I
                  
                                  
                                                              Portrait of western lowland gorilla (Gorilla gorilla gorilla), Bayanga, Central African Republic    
                      
          Gorilla gorilla, Sula sula, and Other Animals Whose Names Are Tautonyms—the Same for Genus and Species
                  
                                  
                                                              All Saints Day. All Souls Day. Candles in cemetery in Poland on All Saints Day, November 1. All Souls Day, November 2. Christian church, All Hallows, Solemnity of All Saints, Feast of All Saints, purgatory, Roman Catholic church    
                      
          7 Unique Burial Rituals Across the World
                  
                                  
                          
                          
                                  
                  
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