This former Masonic lodge has been transformed into part museum, part bar, all awesome.

A good place to research the Freemasons, esoterica, occultism, and hermeticism.

One of the oldest masonic museums in Paris.

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

This derelict building used to house infirm Freemasons, their widows, and orphans.

A once-secret library of Freemason history in Catalonia.

Huge masonic hall in Philadelphia with lavishly themed rooms.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

An ancient quarry rediscovered by a dog and claimed by biblical kings, a German cult, and the Freemasons.

A mud brick kasbah with a history of lavishness and traitorship.

Macabre symbols of death and mummies on display set the tone of this Italian purgatory church.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

American involvement in World War I officially ended in 1921 in New Jersey, three years late and thousands of miles from the battlefield.

A mysterious echo seems to defy the laws of acoustics.

This 13th century castle is chock full of ghosts and impossibly rare cows.

A derelict bit of transportation infrastructure hidden in the woods.

The final resting place of up to 6,000 Confederate soldiers, the largest mass grave in the Western Hemisphere.

Legend says this cave housed a 16th-century cannibal and his family of 48.

Before Nixon, "watergate" meant canals.

The profile of one ill-fated deacon was emblazoned forever on this church window during the Halifax explosion.

This Danish rock field is actually a sprawling ancient cemetery holding the bodies of 700 Vikings.