The Hamilton Mausoleum is a mausoleum located in Hamilton, South Lanarkshire, Scotland. It was the resting place of the family of the Dukes of Hamilton. The mausoleum is Category A listed. Built in the grounds of the now-demolished Hamilton Palace, its high stone vault holds the record for the longest echo within any man-made structure in the world, taking 15 seconds for the sound of a slammed door to fade. In 2014 the record was thought to have been broken at the Inchindown oil storage tanks in the Scottish Highlands, however this was classed as a reverberation, rather than an echo.

Hamilton is a large town in South Lanarkshire, Scotland. It serves as the main administrative centre of the South Lanarkshire council area. It sits 10 miles (16 km) south-east of Glasgow, 37 miles (60 km) south-west of Edinburgh and 74 miles (120 km) north of Carlisle. It is situated on the south bank of the River Clyde at its confluence with the Avon Water. Hamilton is the county town of the historic county of Lanarkshire and is the location of the headquarters of the modern local authority of South Lanarkshire.