Extracted from Wikipedia:

Rongbuk monastery lies by the foot of the Rongbuk Glacier at 5,100 metres (16,700 ft) above sea level,
making it the highest religious building, as well as one of the highest-elevation settlements and overall structures ever built and colonized.
It is only 200 metres (660 ft) lower than the north side Everest Base Camp of Mount Everest.
The monastery is accessible today via vehicle by means of an undeveloped road.
Prior to this, explorers such as George Mallory and Sandy Irvine had to walk for five weeks from Darjeeling, in the Indian foothills of the Himalaya, to reach this location.

It is accessible by dirt road - a two to three hour drive from the China-Nepal Highway, soon after kilometer marker 5145.

Climbers must pass through Rongbuk in order to reach the highest peak of Mount Everest via the North Face.
It has been described as having some of the most dramatic views in the world, presenting a panorama of the Shishapangma,
Mount Everest, Cho Oyu, and Gyachung Kang peaks to visitors.
One of the first British explorers to see it, John Noel, described it:
"Some colossal architect, who built with peaks and valleys, seemed here to have wrought a dramatic prodigy—a hall of grandeur that led to the mountain."