These are a few of the websites I used for research, and a few topics, chosen at random. (Actually, I used books to research Tangerine and Crusader, but it was the 1990s.) Thanks to Wikipedia for providing a free online encyclopedia to the world.

Tangerine

Sinkholes: http://en.wikipedia.org/wiki/Sinkhole
Soccer: http://en.wikipedia.org/wiki/Soccer

Crusader

The Crusades: http://en.wikipedia.org/wiki/Crusades
Shopping Malls: http://en.wikipedia.org/wiki/Shopping_mall

If you want a Muslim perspective on the Crusades, there’s a great article in The Atlantic Online titled “The Roots of Muslim Rage” (September 1990) by Bernard Lewis, but you have to pay (a lot) to access it.

Story Time

Mother Goose: http://www-personal.umich.edu/~pfa/dreamhouse/nursery/rhymes/
Carnegie Library: http://en.wikipedia.org/wiki/Carnegie_library

London Calling

The York Minster: http://www.yorkminster.org
Rembrandt’s Abraham and Isaac: http://www.ibiblio.org/wm/paint/auth/rembrandt/1630/abraham.jpg

Taken

Kreyol-English Dictionary: http://www.haitisurf.com/dictionary.shtml
Victorian Parlor Games: http://www.victoriaspast.com/ParlorGames/parlor_games.htm

Memory Lane

Levittown: http://www.levittownhistoricalsociety.org/history.htm
John F. Kennedy Assassination: http://en.wikipedia.org/wiki/John_F._Kennedy_assassination

A Plague Year

United Flight 93 National Memorial: http://www.nps.gov/flni/index.htm
Eyam, The Plague Village: http://www.beautifulbritain.co.uk/htm/outandabout/eyam.htm