First non-native tourists found a route to the Pacific Ocean in an 1803-06 odyssey along Missouri and Columbia Rivers. As a modern explorer you can trace the journey more quickly at Lewis and Clark Interpretive Center.
The Lewis and Clark Interpretive Center is a 25,000 sq foot building and includes permanent exhibits, 158-seat theater, hands-on education room, and retail store. Make sure to explore the Center's trail system. Several of the trails lead to the Missouri River and offer incredible views of what the first travelers must have seen.