The purpose of my trip to the Himalayas was to study Tibetan Medicine, which I found to have great depth and wisdom. I've already written academic papers on Tibetan Medicine for my classes with the Center for Spirituality and Healing, which I should probably share with you all sometime... A secondary purpose of my trip was to observe the political structure of the Tibetan government-in-exhile which is based in Dharamsala, India. I will eventually work some of those observations into a paper or project for my master's degree in Public Affairs... But in additon I have a strong interest in religion and was deeply moved by the deep Buddhist practice of Tibetans. I found their religious culture to be rich in ritual, philosophy, and practicalities. I had opportunity to study other types of Buddhism previously in college, in Japan here and here, and in Thailand.
So here's a basic visual primer:
Religions of the world, according to adherents.com.

There are three types of Buddhism, all of which were founded in India. Theravada is predominately found in Sri Lanka and Southeast Asian countries. Mahayana is mostly in areas further east like China, Japan, and Korea. Vajrayana is related to Mahayana.

Another very famous visual expression of Tibetan Buddhism is the creation of mandalas. This sand mandala pictured below was made by Tibetan nuns at Dorma Ling nunnery, down in the valley below Dharamsala. The sand mandala is a work of meditative art made out of colorful sand. The making of mandalas is full of tradition, and the colors and symbols in each mandala are ritualistic and usually created to pray for healing and prosperity. Often, at the end of a mandala ceremony, the monks or nuns who made it will perform a ceremony to meditate on impermanence and then brush together the sand. The grains are released into a nearby river, as a blessing for healing for everyone downstream.

There are three types of Buddhism, all of which were founded in India. Theravada is predominately found in Sri Lanka and Southeast Asian countries. Mahayana is mostly in areas further east like China, Japan, and Korea. Vajrayana is related to Mahayana.
This next image is interesting because of its depiction of the percentage populations in these nations. For the last several hundred years Tibet was almost 99% Buddhist, but since the Chinese invasion of Tibet in the 1950's, the new influx of ethnic Chinese has changed the religious makeup of the country.
One of the most famous images of Tibetan Buddhist religious practice is the use of prayer wheels. The circular wheels are painted or carved with prayers, and put on a rotating axis. Rows of these wheels are set up around a temple, so that people walk around the temple "circumambulating", spinning these wheels and saying prayers with each spin. It struck me as similar to a giant rosary, or stations of the cross. I was very moved to both observe and participate. What is it about physical ritual practice that enables deeper contemplation?
These people are circumambulating the Dalai Lama's temple, touching engraved metal scrolls. Each scroll has a prayer on it, and they spin the scrolls as a way to earn 'merit' for each of the prayers as it rotates round and round. People walk meditatively.
Another very famous visual expression of Tibetan Buddhism is the creation of mandalas. This sand mandala pictured below was made by Tibetan nuns at Dorma Ling nunnery, down in the valley below Dharamsala. The sand mandala is a work of meditative art made out of colorful sand. The making of mandalas is full of tradition, and the colors and symbols in each mandala are ritualistic and usually created to pray for healing and prosperity. Often, at the end of a mandala ceremony, the monks or nuns who made it will perform a ceremony to meditate on impermanence and then brush together the sand. The grains are released into a nearby river, as a blessing for healing for everyone downstream.
Just recently, I attended a sand mandala ceremony in Minneapolis along the Mississippi River. Tibetan monks in Minneapolis created a mandala as prayer for healing of the Mississippi and the Gulf. The Mississippi River is long, but we are connected even still.
These people are performing Tibetan Prostrations as an act of devotion. The movements in the prostrations are similar to the yogic asanas of Sun Salutations. Some yoga historians say that Sun Salutations are derived from these Tibetan Prostrations.

I have spent a lot of my time around nuns and monks (Catholic and Buddhist) and am attracted to their influence. However, for a while I was unconvinced that their contemplative lifestyle contributed adequately to the common good, but I am now coming to understand that their choices to live peacefully contribute and inspire us lay people to live more peacefully. Tibetan monks and nuns interact freely among the lay people. This might be an act of courage on the part of the monks and nuns, for surely our busy world distracts from the inner focus they seek. However, I am grateful for their influence.

This family of Himalayan Indians walked a beautiful white goat down the mountain path. My friend later told me they were preparing to sacrifice it! The Himalayan Indians and the Tibetan Buddhists coexist peacefully in the same mountainous region. Sometime I would like to go back and study how they influence and inspire one another.