ESSEX3IN1 [Zaffar et al; https://ieeexplore.ieee.org/document/9126220]
Tokyo24/7 [R. Arandjelović et al; https://arxiv.org/abs/1511.07247]
SPEDTest [Chen et al; https://ieeexplore.ieee.org/document/8421024]
Synthia [Ros et al; https://ieeexplore.ieee.org/document/7780721]
Nordland [Skrede et al; https://bit.ly/2QVBOym]
Gardens Point [Glover et al; https://doi.org/10.5281/zenodo.4590133]
INRIA Holidays [Jegou et al; https://lear.inrialpes.fr/pubs/2008/JDS08/jegou_hewgc08.pdf]
Pittsburgh Query [R. Arandjelović et al; https://arxiv.org/abs/1511.07247]
Cross-Seasons [Larsson et al; https://ieeexplore.ieee.org/document/8953253]
Corridor [Milford et al; https://journals.sagepub.com/doi/abs/10.1177/0278364913490323]
Living Room [Milford et al; https://ieeexplore.ieee.org/document/7487686]
17 Places [Sahdev et al; https://ieeexplore.ieee.org/document/7801503]
These can be downloaded from here. More details for benchmarking can be found here. Please cite the original sources of the datasets when using them in your work.