This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

World's first "penitentiary," meant to be humane, drove men insane.

This legendary dessert was served to Nobel laureates for decades.

When Azorean green tea meets volcanic hot springs water, a luminous brew is born.

A Swedish farm is the world's only producer of the rare, creamy delicacy that is moose cheese.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

Series of storm drains connected to a dark urban legend.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

An enormous, 30-story-deep hole in the middle of Guatemala City.

This recreation of a 19th-century dime museum is full of oddities.

An ode to filmmaker George A. Romero, who used the mall to film an iconic horror movie.

A curious building honoring past and current members of a historic musical comedy troupe.

An occult-y, historic hotel with the World's Largest Ouija board on the roof.

A miniature golf course crafted inside the world's largest simulated cave.

Nothing says indulgence like a 1,500-pound chocolate castle.

A unique workspace where offices reside on pirate ships and inside gingerbread houses.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

Journey through a collection of over 35,000 Halloween items from all generations.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.