A collection of what I've already come across in the meantime:

- World Lighthouses On The Air (#WLOTA)

- (Wind)Mills On The Air (#MOTA)

- Random Metal Objects On The Air (#RMOOTA)

- Boats on the air (I guess the same as Beaches On The Air in the end, even the same acronym #BOTA)

- Walmart Parking Lots on the Air (#WMPLOTA).

- Porta Potties On The Air (#PPOTA)

- Jamboree On The Air (#JOTA)

- Graveyards On The Air (seems to be a joke, #GOTA is already used for #FieldDay anyways)

#hamradio