Mexico City's largest market contains a Willy Wonka-esque wonderland.

A small pack of an ancient, hairless breed of dog once believed to guide souls through the underworld lives on its grounds.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

The burial place of some of Mexico's most prominent residents is full of macabre stories and hidden masonic symbols.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

Frida Kahlo's childhood home, now a museum of her life and works.

Part bookstore, part café, and part forest.

An amazing collection of scale model ships.

Where beautiful signs live on forever.

This cave holds a surprisingly colorful variety of geological oddities.

Every winter, the wind carves blocks of frozen water into beautiful abstract shapes inside this unusually curved tunnel.

A stone marker memorializes the spot where the King broke up a street fight with a classic karate stance.

A collection of 1,300 accordions of all shapes and sizes displayed in chronological order.

One man’s passion for gas stations is on display along the Rio Grande in northern New Mexico.

The spectacular history of spectacles on display.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

This collection of French root art looks like an indoor fairy wonderland.

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.

A fascinating little museum dedicated to the thousands of chemical substances concealed in our food.

A comprehensive collection of Pez dispensers.

These mansions date back to Chicago's days as a brewer's paradise.

See massive fossils that are over 200 million years old in northeastern Arizona.

An archival collection of over 2,200 case studies which includes human brain specimens and tumor specimens.

Ancient human, animal, and geometric figures drawn in the earth.