A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

Beautiful carved tunnels.

A Saint Nicholas-themed ghost town in the Mojave desert.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

A hand-built folk art installation covered with messages of God's love.

This Scottish bridge seems to compel dogs to leap to their death.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

Towering basalt columns, a creation of fire and ice.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Rippling sand dunes frozen in the Arizona rock.