360-degree view of Yangon from the Circular Railway
Bring a passport (supposedly -- no one asked for mine) and a $1 bill to the station master's office on platform 7 of the Yangon Central Train Station. The ticket-taker will show you and a few other tourist-travelers onto the Circular Railway.
Spend the next three hours observing Yangon real life up close as you circle the city. It's fascinating!
Bring an iPod. Seats can be uncomfortable. The train can get warm (no AC, obviously).