
555 Pennsylvania Ave, NW. Photo by PoPville flickr user Tim Brown
Thanks to Hillary for sending:

“After more than 11 years and nearly 10 million visitors, we will be closing Dec. 31, 2019, but there is still time to visit.
You’re #OnDeadline to come and visit us for the FINAL time. Get 15% off tickets online!”
Ed. Note: In January we learned that Johns Hopkins University had acquired the property.