Rothko Chapel and the Houston Arboretum & Nature Center, located in Memorial Park at 4501 Woodway Drive, Houston, 77024 will observe World Environment Day on Wednesday, June 5 at 7am, with an all-ages, free, family-friendly mindfulness walk through the Arboretum trails. To register visit the Rothko Chapel website at http://www.rothkochapel.org/experience/events/register/1583.