The Tump

At the hubward-by-turnwise edge of Ankh-Morpork rises a small but rather steep hill which causes a protrusion of the Wall as it surrounds the rare prominence on the flat silted plain. A single road winds in a spiral to the top, where there remains an ancient ruin, just the foundation of a great square building or wall. This is assumed to have been the castle of the long-ago Kings of Ankh. The stone above has long since gone to build other parts of the city.

For centuries, the Tump, as it's known, was left undeveloped despite the extreme crowding and real estate values in Ankh-Morpork. Recently, however, the need for such a height of land and the corporate ego of Reacher Gilt, et al, created the Tump Tower. This combines the offices and the home terminal of the Grand Trunk Semaphore Company.

In midsummer The Tump also hosts a horse fair.

Annotation

The word "tump" on Roundworld has two meanings. The first is a small hill, but the second - primarily Southern US usage of the word - is to overturn. Often used with over, as in, "You're about to tump that thing over" or, "Is that wheelbarrow going to tump over?"

It could also be a fairly obvious referance to the business and media tycoon Donald Trump, who deveolped Trump Tower in New York.