Couldn't let go of this TB without visiting and earth cache! Welcome to The La Brea Tar Pits in Los Angeles, CA. This tar pit(s) is one of the world’s most famous fossil site for having the largest and most diverse collection of extinct Ice Age plants and animals. Mammals, birds and insects would, inadvertently, come into contact with the asphalt and become trapped. This cycle repeated it self for 30,000 years. To this day, mammals, birds, reptiles and invertebrates find themselves trapped in the asphalt.
For more info: http://www.tarpits.org/