Cave City, Missouri

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.

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.

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

KHBL-LP (96.9 FM) is a low-power community radio station licensed to serve Hannibal, Missouri. The station is owned by KHBL, a not for profit corporation in Missouri. It airs a community radio format. The station's music programming includes a mix of music from the 1950s to the present. The station was assigned the KHBL-LP call letters by the Federal Communications Commission on February 19, 2002.

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.

Ilasco is an unincorporated community in Ralls County, in the U.S. state of Missouri.

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.

Ilasco Historic District is a national historic district located at Ilasco, Ralls County, Missouri. The district encompasses two contributing buildings and one contributing structure in the unincorporated community of Ilasco. It developed about 1909–1910, and includes a jail, a one-story commercial building with two storefronts, and a Pratt pony truss bridge. It was listed on the National Register of Historic Places in 2016.

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.

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.

The buildings at 207–209 South Main St. are two historic commercial buildings located at Hannibal, Marion County, Missouri. They were built about 1860 and are two two-bay, two-story brick storefront buildings. They have high transom or fascia areas and segmental arched windows on the second story.: 52–53  It was added to the National Register of Historic Places in 1986.

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.