Fort Fredrick in Trincomalee is also known as "the Dutch Fort" and additionally "the Trincomalee Fort', build by Portuguese in 1623 and was captured by Dutch in 1639. Later this was captured by British in 1795 and it kept on being a British fortress till 1948. Inside this fort, the famous Koneswaram temple is located. This Hindu temple earlier know as temple of thousand Pillars. Fort Fredrick is presently possessed by Sri Lankan military and government authoritative structures, but you can go through it and visit the Koneswaram temple. .
If you are visiting this place, you need to park your vehicles by the nearby parking area and get a three wheeler and visit the temple at the top of the hill. Its more than 1 km from the parking area to the Koneswaran temple. You can take a bath at the nearby beach.