Mark Twain Memorial Lighthouse sits on 10 acres of park atop Cardiff Hill, a favorite play area of Tom Sawyer, Huckleberry Finn and the gang. Cross streets are E. Rock and E. Cardiff. Parking is available near the top.  There is also a rear entrance from Cardiff Hill Drive, offering handicapped accessible parking.  There are 244 steps leading uphill to the Lighthouse from the north end of Main Street in historic downtown Hannibal. The Lighthouse offers a panoramic view of Hannibal and the Mississippi River.

Lover's Leap is 5 acres of park atop a bluff on the south edge of town, directly off highway 79. Entrance sign is marked. A shelter, benches, historical information and a lighted flag are there. It offers a panoramic view of Hannibal, the Mississippi River and miles across into Illinois.

Cardiff Hill Overlook Park is located at 505 N. 3rd Street. It is the site of the old bridge approach. This 1 acre lighted park has picnic tables and benches nestled among newly tree lined sidewalks and flower beds. The steps to the Lighthouse pass through here as well. Enjoy the scenic view of the Mississippi River at the top of the walkway.