A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

France's most famous cemetery, with some of its most curious tombs.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

Resting place of Hollywood's immortals is also site of summer film screenings.

America's most famous piece of self-built architecture.

The legendary building that needed ghostly approval before being built.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

Giant marble phalluses on the sacred island of antiquity.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Roman ruins, natural methane fires and a lovely beach.

This famous city eluded concrete detection until the early 2000's.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

A marvel of Byzantine engineering under the streets of Istanbul.

Roman ruins top white travertine terraces formed by ancient hot springs.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A crumbling hospital from the 1850s on Roosevelt Island.

An unusual round church in London with a Templar past.

A kaleidoscopic warehouse-maze of handmade neon signs.