Memorial Park is notorious for its bathrooms where men troll for random sex, but if you're looking for a quiet spot in the city for a risqué encounter with a significant other — someplace where you're less likely to get arrested — you can't beat the Arboretum and Nature Center, a secluded enclave of towering foliage just minutes from the Galleria. We heard that the best spot was an observation deck that's about a ten-minute walk from the main parking lot, but just before temptation got the best of us, an elderly couple walked up and interrupted our time. Or maybe we interrupted them. The Arboretum is open until 7 p.m. daily, but the hours don't seem to be enforced, so we suggest an after-hours trip at dusk. And don't forget: Donations are welcome.