The Hamilton Mausoleum has possibly the longest reverb of any building in the world - nearly 15 seconds.
It is located in Hamilton, South Lanarkshire and was completed in 1858 to house the sarcophogaus of Alexander, the 10th Duke of Hamilton, alongside his ancestors. Read more about it on Wikipedia.
In 2013 several members of the New Radiophonic Workshop went to the Mausoleum to record the reverb. We made Impulse Response recordings so that anyone with a convolution reverb (Space Designer, Altiverb, etc) can hear their sounds in the space.
The IRs are available in SDIR format for Space Designer, or WAV for everything else. They were recorded using an RME Fireface directly into a laptop, using the following microphone placements:
You can use the B-Format recordings for surround reverbs.
Many thanks to Visit Lanarkshire for hosting us.