Field Trip Ideas
US Memorials & Monuments
http://www.travelchannel.com/destinations/us/photos/us-memorials-and-monuments
America’s State Parks
https://www.stateparks.com/usa.html
America’s 10 Best Zoos
http://www.fodors.com/news/photos/americas-10-best-zoos
American Museum of Natural History
https://www.si.edu/museums/american-history-museum
America’s Trails
14 Best Museums in the World
http://www.touropia.com/best-museums-in-the-world/