Portions of the Cataloochee Valley in Great Smoky Mountains National Park in North Carolina are scheduled to open at noon local time Friday.

A number of repair projects will require Cleetwood Cove at Crater Lake National Park to be closed for two or more years, meaning there will be no boat tours of the lake during that period.

A lack of staffing at Yosemite National Park, and the decision to open campgrounds, has raised the prospect of existing staff being unable to maintain restrooms as visitors head to the park for some R&R.

To be honest, I have no clue what I’m looking at beyond the fact that it’s a key object in the World War II-era race to develop the world’s first atomic weapons before Nazi Germany. There is a giant wall full of holes that reminds me of a Lite-Brite toy, mannequin men with rods and a legend that talks about donut, iodine and uranium fuel slugs.