Several historical maps showing steamship routes around 1900, ancient world maps, and shipping routes and lines in 1912, including those that passed through the Panama Canal.

This collection provides maps dating back to 1500 up to the present. The collection includes: cities, towns, discovery and exploration, conservation and environment, military battles, cultural landscapes, transportation, communication,...

Discover the relationship between Pennsylvanians and the environment through this detailed, historical account which contains links to audio, video, pictorial images of the era.