This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

A network of concealed passageways lies within a busy London Underground station.

Hear the quietest sound from across the dome.

The anatomical-pathological collection of a man who changed surgery.

Beautifully carved tombstones fill this unmarked graveyard, uniquely situated near the village's famous stone wine cellars.

The ridged layers that make up this river canyon represent Earth's geological history.

A huge museum of much more than just agriculture displayed in a princess's palace.

Located near Cairo's El Korba district, the abandoned mansion continues to inspire mystery and rumor throughout the city.

Charnel house at the foot of Mount Sinai.

The once great capital of Egypt now crumbles forward as evocative ruins.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

A massive work of modern art that appears to be a crop circle in the middle of the desert.

One of the holiest Shi'i shrines in Iran honors the life and death of a learned noblewoman who became a saint.

The largest covered bazaar in the world.

Long before air conditioning, Persian architects found an ingenious way to cool off.

Concrete balls on wires constructed to stop train surfing in Indonesia.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

Sail in for a ’dam good slice.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A curious collection dedicated to human and animal anatomy and pathology.

18m long sarcophagus of a constantly growing dead prophet.

Ancient barriers wrap around what was once an important stop along the Silk Road.

Portugal's National Pantheon has a history of curses, collapses and financial problems.