Levee Township, Pike County, Illinois

Pearl Island, also known as Glasscock Island, is a river island in the Mississippi River. It is in Levee Township in Illinois. Formerly, it was considered part of Hannibal, Missouri. Nearby islands include Shuck Island and Tower Island. It is the setting for Jackson's Island in books by Mark Twain.

Munger is an unincorporated community in Pike County, Illinois, United States. The location is adjacent to the Pike-Adams county line on the Mississippi floodplain two miles east of the Mississippi River and northeast of East Hannibal. Fall Creek is approximately 1.5 miles to the northeast. The Burlington Northern Railroad line passes by the community.

Shuck Island is a small island in the Mississippi River, located in Pike County, Illinois, opposite Hannibal, Missouri.

Cave City is an unincorporated community in Marion County, in the U.S. state of Missouri. The community was named for nearby Mark Twain Cave.

Mark Twain Cave — originally McDowell's Cave — is a show cave located near Hannibal, Missouri. It was named for author Mark Twain whose real name was Samuel Langhorne Clemens. Clemens lived in Hannibal from 1839 to 1853, age 4 to 17. It is the oldest operating show cave in the state, giving tours continuously since 1886. Along with nearby Cameron Cave, it became a registered National Natural Landmark in 1972, with a citation reading "Exceptionally good examples of the maze type of cavern development." The cave — as "McDougal's Cave" — plays an important role in the novel The Adventures of Tom Sawyer (1876) by Mark Twain and was renamed in honor of the author in 1880.

East Hannibal is an unincorporated community in Levee Township, Pike County, in the U.S. state of Illinois. The community was named for its location east of Hannibal, Missouri.

The Mark Twain Memorial Bridge was a cantilevered through truss bridge carrying US 36 over the Mississippi River. It was replaced in 2000 with the extension of I-72 and subsequently demolished.

Bear Creek is a stream in Marion and Ralls counties in the U.S. state of Missouri. It is a tributary of the Mississippi River. The creek enters the Mississippi on the southeast side of Hannibal. Bear Creek was named for the fact bears were hunted there by pioneer citizens.

Hafner Grocery Warehouse is a historic commercial warehouse located at Hannibal, Marion County, Missouri. It was built about 1910, and is a three-story brick structure on a concrete foundation. It features seven bays of segmental-arched windows and a corbelled parapet.: 48–49  It was added to the National Register of Historic Places in 1986.

Digel Block was a historic commercial building located at Hannibal, Marion County, Missouri. It was built in 1901, and was a two-story red-brick building. It featured an ornamental parapet screening a flat roof.: 54–55  It has been demolished. It was added to the National Register of Historic Places in 1986.

Ebert-Dulany House is a historic home located at Hannibal, Marion County, Missouri. It was built about 1865, and is a two-story, Second Empire style brick dwelling. It has a mansard roof and sits on a rock-faced ashlar foundation. It features a large bracketed hood above once sheltered a balcony and a wide bracketed frieze that runs below the modillioned cornice. The house was restored in the late-1980s.: 2  It was added to the National Register of Historic Places in 1983. It is located in the Maple Avenue Historic District.

Mark Twain Hotel is a historic hotel building located at Hannibal, Marion County, Missouri. It was designed by Barnett, Haynes & Barnett and built in 1905. It is a four-story, Renaissance Revival style steel-frame structure with a granite foundation and beige pressed-brick exterior. The annex was built in 1918. It features semicircular arches over the main door and adjacent windows.: 50–51  It was then added to the National Register of Historic Places in 1986.