The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The "lovely red Vega" of the legendary record-settling pilot.

It was once the base for a series of domestic terror attacks.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Sleepy Minneapolis block beats Guinness Record for most churches on one city block.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

An entire city block built completely out of petrified wood.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

An amazing collection of sculptures and art.

The only arched bridge made of stone on the entire Mississippi River.

World's largest carved onyx figure stands as a tribute to enduring peace.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

A fitting attraction for the corn capital of the world.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.