La Brea Tar Pits
A natural and very smelly attraction in Los Angeles is the La Brea Tar Pits on Wilshire Boulevard. In this location, natural oily tar (asphalt) seeps upward through the ground’s surface. The odour is akin to a freshly paved road.
This site has been a tar pit (rather a series of tar pits of varying sizes) for many millennia; the gooey liquid has preserved elephants and mammoths that got stuck there. You can still see the black goo bubbling up as you tour the various displays that include recreations of the animals, relics of the last ice age.
Admission is free (maybe because of the stench!) and the La Brea Tar Pits will fascinate anyone interested in palaeontology. Watch where you step as you tour this site; smaller new tar pits can break through the lawn at any time, but don’t worry, it’s only the larger ones that pose a threat and they are set within fences.