Roseau is the capital city of Dominica.
Very reasonably priced buses, (in the form of mini buses) that travel around most of the island can be boarded in Roseau. Destinations are not usually posted on the front, but local people are very helpful and can tell you where the bus stops are for each town.
Botanical Gardens - interesting collection of specimens and a school bus that was crushed by a tree during a hurricane. The cricket pitch for the town is located nearby.