#19

Check out all books by Dave Hickey from Corcoran Library - don't return.

#18 (Displacement series)

Toss a rock removed from Lake Desoto in Hot Springs Village, Arkansas into Laurel Lake in Maryland.

#17

"Anonymous Art" found.

#16

Glue small plaque on wall near NW corner of 7th & Independence Ave: text reads: "Spiral Jelly" site - for Robert Smithson."

#15

Glue small plaque on wall near corner of 17th & G Streets: text reads: "Corner Pie" site - for Robert Morris."