Mesa Mesa Mesa (Spanish and Portuguese for "table") is the American English term for tableland, an elevated area of land with a flat top and sides that are usually steep cliffs. It takes its name from its characteristic table-top shape. It may also be called a table hill, table-topped hill or table mountain. It is larger than a butte, which it otherwise resembles closely. It is a characteristic landform of arid environments, particularly the Western and Southwestern United States in badlands and mountainous regions ranging from Washington and California to the Dakotas, Wyoming, Utah, Oklahoma, and Texas. Examples are also found
Flat Bastion portion, now a geological research and exhibition facility. The bastion is a listed building with the Gibraltar Heritage Trust. While St. Jago's Bastion has been said to be an early name for Flat Bastion, it has a separate listing with the Gibraltar Heritage Trust, next to those for Flat Bastion and Flat Bastion Magazine. The Spanish began construction of Flat Bastion in the 16th century, in 1552, at which time it was referred to as St. Jago's or Santiago's Bastion (). According to Dr. Darren Fa and Professor Clive Finlayson, both of the Gibraltar Museum, Flat Bastion was built by