A madman's personal garden filled with 1,000 sculpted heads.

This megalithic tomb was crafted by a mysterious civilization that settled the island of Pantelleria.

Eat your Big Mac in a DC-3.

The ornate miniature mansions were built for Istanbul's feathered residents.

Climb atop one of the world's longest and heaviest trains for an unbelievable journey across the Sahara Desert.

A lonely beacon, precariously perched atop a remote sliver of rock.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

This is what trains will look like after the zombie apocalypse.

The secret wartime bunker built on the platforms of an abandoned Tube station.

A railway bridge leading nowhere stands lonely in the middle of a meadow.

This beautiful train graveyard is one of the largest collections of steam locomotives in the Mediterranean and Europe.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

Abandoned Nazi train station turned underground astroparticle laboratory.

The old church, buried by the 1784 Mount Vesuvius eruption, is a remarkably well-preserved place where people now pray for the souls of the dead.

Before the more famous Royal Palace of Caserta, the king of Naples first commissioned this overlooked residence.

Pompeii's less famous neighbor is still revealing her secrets.

This former railway facility is the oldest in Slovenia, and now houses a museum showcasing the history of steam locomotives.

The first Italian factory to produce locomotives is now a marvelous museum.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.