An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

Architectural elements and building materials for this house were transported from Salisbury, England.

Illegal drag racing two stories beneath Chicago’s streets.

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

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

An adorably sweet display of sculpted Precious Moments figurines.

Where the author wrote her beloved "Little House" books.

The world's largest collection of Don Quixote-inspired art.

A Mexican Romeo-and-Juliet-esque legend has given this super-narrow alleyway a reputation for romance.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

The splendor of this 17th century golden chapel has led it to be called the "eighth wonder of the world."

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

This simple home was the beginning of a long journey for the iconic Western film star.

This zombie-themed restaurant stands out in the heart of corn country.

Lured here by the promise of tens of thousands in gold, Jesse James started a quintessentially American trend of robbing trains in-motion.

A number of gruesome unsolved murders have turned this simple home into a morbid tourist trap.