The La Brea Pitch Lake is a natural asphalt lake located in the village of La Brea in southwestern Trinidad and Tobago. It is the largest natural deposit of asphalt in the world, covering an area of around 100 acres and varying in depth from a few inches to over 250 feet.

The lake is believed to have formed thousands of years ago when oil from deep within the earth seeped up through faults in the rock and mixed with marine sediments. Over time, the lighter hydrocarbons evaporated, leaving behind the thick, heavy asphalt that is present today.

The asphalt from the Pitch Lake has been used for various purposes over the years, including road construction, waterproofing, and even as a medicinal ointment. The lake is also home to a number of unique microorganisms, some of which are believed to have potential medical applications.

Today, the Pitch Lake is a popular tourist attraction, with visitors able to walk on its surface and even swim in the warm, viscous asphalt. There is also a small museum on site that provides more information about the history and geology of the lake.