Cal Neva Underground Tunnel

While it probably is just dust, I got a photo of an orb while taking pictures in the underground Cal Neva Tunnel tour, and this location is infamously haunted. The casino was originally owned by Frank Sinatra and the tunnels were used for various nefarious activities which involve boot legging, prostitution, housing underpaid Chinese laborers, acting as a getaway for mobsters, and according to legend storing dead bodies which were eventually dumped within the lake. This location has been visited by various different paranormal investigative groups.