10 most difficult America riddles

The city is ancient - its largest pyramid, the Pyramid of the Sun, was completed by AD 100. It predates most known cultures of Mesoamerica. The origin of its founders is uncertain, and its original name is also unknown. It housed a population of about 150,000 people, making it one of the largest cities in the world at that time.

Yale University is found in New Haven, Connecticut. The university has produced 5 U.S. presidents, and many other notable alumni.

Located in Montezuma County, Colorado, the park protects some of the best-preserved Ancestral Puebloan archaeological sites in the United States. It's one of the three UNESCO World Heritage Sites located in the U.S. that are credited to the Anasazi, alongsidde with Chaco Culture National Historical Park and Taos Pueblo.

The Boiling Lake is situated in the Morne Trois Pitons National Park, Dominica's World Heritage site. It is the second-largest hot lake in the world after the Frying Pan Lake in New Zealand. Its temperature range is from 180 to 197 °F (82–92 °C) along the edges, but at the centre it is actively boiling.

The name America was first recorded in 1507. Christie's auction house says a two-dimensional globe created by Martin Waldseemüller was the earliest recorded use of the term. America derives from Americus, the Latin version of Italian explorer Amerigo Vespucci's first name.

John Cabot (Italian: Giovanni Caboto, Venetian: Zuan Chabotto) was a Venetian navigator and explorer whose 1497 discovery of the coast of North America under the commission of Henry VII of England was the first European exploration of the mainland of North America.

France has the shortest border with ... Holland. The border is 13 km (8.08 mi) long. Saint Martin is an island in the Caribbean Sea, is divided between the French Republic and the Kingdom of the Netherlands, but the two parts are roughly equal in population. The division dates to 1648.

With over 14 million inhabitants, Guatemala is almost twice as populous as Honduras (7.4M) and Nicaragua (5.7M), even though both Honduras and Nicaragua are larger by area.

The Freedom Trail winds through downtown Boston, highlighting historic sites such as the Boston Common and U.S.S. Constitution.

In 1938, American architect Alfred Mosher Butts created the game as a variation on an earlier word game he invented called Lexiko. In 1948, James Brunot bought the rights to manufacture the game in exchange for granting Butts a royalty on every unit sold. There are around 4,000 Scrabble clubs around the world.