Four grand mausolea — the Urn, Silk, Corinthian, and Palace Tombs — cut side by side into a single massive cliff. The scale signals these weren't built for ordinary Nabataeans. The Urn Tomb was later converted into a Byzantine church in 446 AD, which tells you how long people kept finding uses for what the Nabataeans built.
© Orit Kislev, CC BY 3.0, via Wikimedia Commons