These Photos Reveal What Lies Beneath Europe's Tourist Attractions
Below Big Ben in London is the abandoned Aldwych station.
Historic hotel Pancras Renaissance London in London is located above the London Postal Museum railway line.
After visiting the elevated buildings and hotspots of Krakow in Poland, go underground and you'll find the beautiful Wieliczka Salt Mine.
Barrio de Cuevas is the largest cave complex in Europe with 3,000 inhabitants.
Below this famous picturesque region of Naples lies the ancient Bourbon underground tunnel.
Beneath the world-famous views of the city in Paris are Les Catacombes de Paris Paris Museums, underground ossuaries that house the remains of millions of people.