The capital nearest to the Tropic of Cancer is Nicosia, the capital of Cyprus. Nicosia is located at approximately 35 degrees North latitude, making it one of the closest capitals to this latitude line. The Tropic of Cancer runs through several other regions, but Nicosia is notable for being relatively close among national capitals.
Wisconsin, Indiana, Kentucky, Missouri, Iowa
The nearest state capitals to Canberra are Sydney and Melbourne.
The line of latitude nearest to London, UK is approximately 51.5 degrees north.
The intersection of Jasper and Main in Paris is located at 39.60349° north latitude 87.69484° west longitude. In addition to the state of Illinois, that parallel of north latitude passes through California, Nevada, Colorado, Utah, Kansas, and Missouri, as well as Portugal, Spain, Italy, Greece, Turkey, Iran, Azerbaijan, Armenia, Turkmenistan, Uzbekistan, Tajikistan, Kyrgyzstan, China, North Korea, and Japan. As you might imagine, there are quite a few cities along that line, certainly too numerous to list here.
Pittsburg
Paris is the nearest foreign capital city to London, closely followed by Brussels.
For Latitude 130! and Longitude 150!
Mountains don't have Capitals. You'll have to settle for nearest city.
To the best of my knowledge, Swift Transportation does not have any terminals in Illinois (although I do believe they have a couple drop yards). The nearest terminal would probably be Gary, Indiana.
Indianapolis
The nearest airport is Chicago Executive. The nearest major airport is O'Hare International.