Top 5 Buddhist tourism destinations of Asia

1. Bodhgaya Nalanda, India

2. Mount Koya, Kii Peninsula, Japan

3. Temples of Bangkok, Thailand

4. Lhama Tibetan Temple, Beijing, China

5. Birthplace of Lord Buddha, Lumbini, Nepal

http://www.helium.com/items/1937742-top-destinations-in-asia-for-visiting-buddist-temples

A guess a list like this depends on what you're looking for and whether you are a Buddhist or not. Personally I like remote mountain temples.

As long as people realize that Bodhgaya is 100 km from Nalanda. Not far but not exactly co-located.