A monument to the art of slicing people open.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

All of Chicago's wood-paved streets are long gone but two alleys remain.

This historic hotel invented the chocolate brownie.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

A hotel and restaurant serving as the mecca of kitsch.

A massive volcanic plug is now a protected area that hosts a number of bird species.

An alley covered with 20 years of bubble gum.

A remote crossroads honoring a fallen talent.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

Quite simply the largest tree in the world (by volume).

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

A hugely vast Irish landscape of barren rock that stretches for miles.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.