Water, that is.
The hexagonal red brick building on the west lawn of the Senate side has a drinking fountain for more than 13 decades. There’s even seating for 22.
Frederick Law Olmsted created arched entranceways, small windows, carvings and lots of ornate artistry with even a basket-weave exterior. The interior stone seats are underneath red Spanish mission tile for shade. The focus is a small grotto where water cascades over rocks, though there are also three drinking fountains. The water from a spring is fine, having tried it many times without a problem.