This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.

In Egypt's expanding metro area, many of the neighbors are dead.

Ming Dynasty necropolis raided during the Cultural Revolution.

Why walk on this historical site when you can zoom down instead?

Claude Monet was baptized in this lavishly ornate Paris church.

Located within one of Israel's most picturesque monasteries is also the country's first meteorological research station.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

The largest earthwork effigy in the world.

The site of one of history's most indelible and horrific tragedies.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

This famous city eluded concrete detection until the early 2000's.

Climb the dead electric pylons of Messina.

The site of the climactic scene from the classic horror film is now a historic landmark.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Stolen goods adorn the organ at Old North Church.

The site of Paul Revere's historic two lantern warning.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Statue commemorating the use of ether in anesthesia.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.