The bottom of the 24-inch Clark Telescope--the one in which Percival Lowell made observations of Mars. 

The upper section of the Clark Telescope.

The Clark Telescope dome.

A 500 lb meteorite found in Diablo Canyon.

Percival Lowell's mausoleum.

The particulars of Lowell's life.

The front of the mausoleum.

Lowell's writings on the left side of the mausoleum.

Lowell's writings on the right side of the mausoleum. 

A working dome telescope at the observatory.

A wood-cut of Percival Lowell pointing the way to the Pluto Walk. 

The Pluto Walk--showing the relative distances of the planets of the solar system if they were miniaturized and laid out along this sidewalk.

The dome where Clyde Tombaugh discovered the planet (sub-planet?) Pluto in 1930.

Another view of the Pluto dome.

The entrance to the Lowell Observatory on Mars Hill.

The Lowell Observatory has been around for a long tme.

Attempts have been made to decorate two water tanks that are seen along the Pluto Walk.

The other decorated water tank

The old water tank--located near the McAllister Dome and Telescope.

The Lowell Sundial--given to him on his 50th birthday in 1905 by the observatory employees; the gnomon points directly to the North Star at night.

The view of Flagstaff as seen from Mars Hill. 

The path to the John Vickers McAllister Public Observatory. 

The McAllister Dome.