According to one local tradition, the entrance to the Voodoo underworld can be found in New Orleans through seven gates scattered throughout the city's French Quarter.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

The oldest surviving botanic garden in the United States.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

Where America's first doomsday cult awaited the end of the world.

A bloodstain from "the wound of the transverberation of the heart."

One-of-a-kind preserved ruins of an abandoned 1880s church in Chicago's Pilsen neighborhood.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

A display of magnificent stained glass windows is the first exhibit of its kind.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A rare view of a preserved Victorian science museum.

Huge masonic hall in Philadelphia with lavishly themed rooms.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

One of the most unusual geological features, recognizable from a dozen hit movies.

Water of undetermined depth has attracted rare fish and cult leaders alike.

The location of the last stand of Charles Manson's doomsday cult.

Odd outsider art installations surround a Gold Rush-era ghost town.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

World's largest collection of serial killer artwork and other macabre exhibits.