Capitol Hill

Some of the cycads still alive in here were collected during the U.S. Exploring Expedition of 1838 — pulled off a ship that circled the globe before the Civil War, and quietly outliving everyone who's ever walked past them. That's the thing nobody tells you about this glass jungle at the Capitol's foot: it's less a museum than a 200-year-old hoarder's collection that happens to be breathing. The Garden Court climbs 93 feet overhead, packed with carnivorous plants, an orchid wall, a Hawaiian room, and medicinal herbs the Egyptians, Chinese, and Greeks all swore by. It's free, open 364 days a year, and somehow almost never crowded. On a brutal August afternoon, the tropics pavilion pulls a strange trick — the 95-degree wet heat in there feels like relief after the blazing marble outside. One thing: the second you step into the jungle room, your phone lens fogs solid. Let it sit thirty seconds before you try any photos, or wipe it and shoot fast — and don't bother with glasses for a minute.