Madlum Cave is located on the northern part of the Biak na Bato National Park in San Miguel, Bulacan Province. Unique rock formations inside the cave have amazed visitors while local folk say these hidden natural wonders are also home to the ‘diwatas’ or fairies. Madlum Cave is a prominent feature in the Angat Limestone Formation which occupy most of the whole reservation of Biak-na-Bato National Park and is considered a shrine by the people of San Miguel, Bulacan. There are three giant portals to the approximately 50-meter long cavern. An entrance to the right, which is about 30 meters from the water level of the Madlum River, is a statue of the Virgin Mary. It is the place where the town’s patron saint, St. Michael, was found. It is located in Sitio Madlum, Brgy. Sibul Spring. It is only 5 minutes ride on a private vehicle from the Poblacion or in an hour or so from the North Luzon Expressway by bus plying the Manila – Tuguegarao route. This place which offers a scenic view of the natural environment delights excursionists and nature lovers. Guides are required to explor the spots of the Biak-na-Bato National Park. Prices ranges from Php 300-400/day.
To get to the Madium Cave by bus, take any Cabanatuan-bound bus from Cubao or Pasay (Baliwag Transit, ES Transport, and Five Star Transport). Tell the conductor to drop you off at Brgy. Kamias, San Miguel, Bulacan. Fare is around P130-150. Then from Brgy. Kamias, you can take a tricycle/ chartered jeep to jumpoff at Brgy Madlum (P200/tricycle).