'black head hill'), also known as Tai Pau Mai (大包米; 'large bag of rice') indigenously, or by the names Tsim Sha Tsui Point and Signal Hill (訊號山), was a cape before any land reclamation took place in Tsim Sha Tsui, Kowloon, Hong Kong.

The purpose of the tower was to house a time ball apparatus of the Hong Kong Observatory previously located in the nearby Marine Police Headquarters Compound.

The dropping of the time ball ceased on 30 June 1933 as the building itself was in disrepair, short of staff, and the method used to check the marine chronometers had become obsolete, in comparison with radio-telegraphy and telephony.

Later, four British 25-pound cannons used for ceremonial salute were located in concrete gun emplacements facing Victoria Harbour.

[1] The site was allocated to the Urban Council in 1973 and made a park, called the Signal Hill Garden (訊號山花園), which was officially opened on 20 August 1974.

A small building in the park, now repurposed as a toilet, was where typhoon signals were hoisted in Hong Kong as it was located on the highest hill near the middle of Victoria Harbour.