Helsinki is a lively, green city. One-fourth of its area consists of parks. The city centre is characterized by the Parisian ambience of the Esplanade Park. A walk under the trees also allows you to view the specialist boutiques and shops aligning the park. Visitors to the Finlandia Hall or Opera may take a stroll along Töölönlahti Bay, the lifeline of the city's inhabitants. The Winter Garden stands guard at the north end of the park surrounding the bay, with tropical blooms and goldfish sporting in their fountain under its glass roofing.