Catacombs of Paris

The Catacombs house the skeletal remains of over six million Parisians in a 1.7-kilometer underground network that was once limestone quarries. You'll walk through narrow tunnels lined with carefully arranged femurs, skulls, and tibias-the bone walls are stacked several meters deep in artistic patterns that took workers years to complete in the 1780s when overcrowded cemeteries were emptied.

The route is one-way through cramped passages where you can't turn back once you start. The most striking section is the ossuary proper, where bones form decorative patterns and philosophical inscriptions are carved into stone. The skull arrangements are genuinely impressive-rows of empty eye sockets staring back at you from walls that stretch into darkness. The audio guide provides decent historical context about Paris's cemetery crisis.

Book tickets weeks ahead online or you won't get in-the daily visitor limit is strict. The tour moves at a fixed pace through single-file passages, so claustrophobic visitors should reconsider. Skip the overpriced gift shop but don't miss the final room's ceiling made entirely of arranged leg bones. Most visitors rush through; take time to read the Latin inscriptions.