Marikina City known as the Shoe capital of the Philippines because of the booming industry of shoe industries in the city, it is home to the World's Largest Pairs of Shoes and has a museum that contains collections of shoes owned by famous celebrities and notably the former first lady; Imelda Marcos. Aside from being the shoe capital, it has one of Asia's most disciplined people and Asia and healthiest and most likable people including one of most cleanest cities in Asia which makes it a twin city to Singapore.
The LRT2 terminal station is Santolan, which brings you into Marikina. SM Marikina is a walkway away, and jeepneys and taxis can take you anywhere else you need to go in the city. The Manila Train Guide  has a map and tips on how to use the train system.
Various modes of transportation are easily available in and around the city. The most affordable mode of transport for the locals is the tricycle that can sit up to 2 persons with a little extra leg room for carry-on in the cabin. It is the most preferred as it zips around the small lanes easily. However, they are not permitted on the highway. Other common modes of transport are the jeepney and taxi cabs.
If you want go swimming, you can do it in Marikina Sport Center (http://www.marikina.gov.ph/pages/culture-and-tourism/tourism-places.jsp & scroll down). It´s nice there, and not too many people.