Astronomy
There are many old scientific instruments
Florence,ItalyA park themed around the Tropic of Cancer
Pu'er,ChinaThe place where the prime meridian is located
London,United KingdomPrime location for stargazing at night
Lake Tekapo,New ZealandA tour of India's and Islamic architecture in Delhi
IndiaRepair the most complete building
Chichen Itza,MexicoVisiting museums, galleries, and exhibitions in Chicago
United StatesLandmark architectural complexes of Maya culture
Chichen Itza,MexicoForm various vivid patterns
Nazca,Peru1