1. By E.I. See Montgomery County Public Schools, Maryland Grade 4 Integrated Curriculum 2012

2. Eisenhower Tunnel

9. Eisenhower Tunnel Facts Longest mountain tunnel Highest point on the Interstate Highway system Crosses Continental Divide in Rocky Mountains Highest vehicular tunnel in the United States Passes under Loveland Pass

10. Eisenhower Tunnel

11. Port of South Louisiana Stretching 54 miles from New Orleans to Baton Rouge, the Port of South Louisiana is the largest bulk cargo port in the world.

12. Port of South Louisiana

17. Point State Park

18. The park is located at the confluence, or meeting of the Allegheny and Monongahela Rivers which meet to form the Ohio River in western Pennsylvania. Pearson #16879 Pennsylvania elevation map

19. Point State Park

21. Within the park are remains of two historically significant forts - Fort Duquesne and Fort Pitt. Remains of Ft. Duquesne Fort Pitt Blockhouse

22. Point State Park

23. The fountain at the tip of Point State Park uses water from an aquifer, or rock through which ground water flows. This aquifer runs underneath the park and is part of an ancient river channel that is now filled with rock and gravel known as the Wisconsin Glacial Flow.

24. Grand Canyon Skywalk

27. According to the graph, about how far is it from the Skywalk to the Colorado River below?

28. Grand Canyon Skywalk Colorado River flowing below the Grand Canyon

29. Grand Canyon Skywalk

31. Fourth Street Elevator

32. This funicular, or rope-operated railway, is found in Dubuque, Iowa, one of the few cities in Iowa with hills. It began operation in 1882, taking passengers from Fenelon Street on the top of the hill to Fourth Street below. From the observation deck at the top of the funicular, three states can be seen. It claims to be the shortest railway in the world (but many funiculars do…).

33. Fourth Street Elevator

36. View of the Mississippi River from the 4 th Street Elevator Observation Deck