New fungal and bacterial species call this deadly lake home.

A lake formed in the basin of a massive impact crater takes the shape of an unbroken ring when viewed from above.

This cramped crevasse saw the entire population of its island suffocated inside its depths.

These fantastically named natural pools look like something out of a Scottish myth.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

A 200-year-old prison that now houses a peculiar crime museum.

The world's largest collection of witchcraft regalia.

One of the best collections of wax anatomical models in the world.

A 18th century graveyard and its astonishing cortege of macabre iconography.

An 18th century monument regularly tagged with unsettling graffiti referencing a 1940s unsolved murder.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

Remnants of a Victorian garden feature sitting in public woodland.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

A historic arboretum and non-conformist, non-denominational park cemetery.

A Victorian park cemetery, standing on the site of what was once the Great North Wood.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

An ancient monastery, a locked room, and a mysterious book heist.

Thousands of well-dressed mummies below a monastery.