Since the BBC show topic has also morphed into what should be the 7 or 8 wonders of the Buddhist world in general, I have merged it with this existing topic.
In the OP for this topic, my choices are based on:
Maha Bodhi Temple (most important site for Buddhists and in Bodh Gaya)
And additional choices based on having at least one representative from Sri Lanka, Thailand, and Burma, considering their importance to Buddhism, especially Theravada Buddhism.
World's largest book of any kind (the one in Burma, the Tipitaka on marble slabs) seems very appropriate
Angkor Wat (largest Buddhist temple in the world, which is also a Theravada temple since about the year 1200).
And then gotta have the internet, after all here we are discussing Dhamma on quite an invention that connects kalyana mittas
from around the world.