Töölönlahti (Töölö Bay in English) is located in the very heart of Helsinki. The bay is surrounded by many important cultural and sport venues; including Finlandia Talo (Finland Hall), Suomen Kansallisooppera (Finnish National Opera and Ballet), Olympiastadion (Helsinki Olympic Stadium) and Talvipuutarha (Helsinki Winter Garden).
On the eastern side of the bay there are some wooden villas reminding the history of Helsinki. You can also spot the tallest buildings of the Linnanmäki amusement park on the northern corner of the bay. So taking a walk along the walking path around Töölönlahti is a must to do in Helsinki.