A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

The last remaining vestige of a popular 1999 public art display.

The Australian terminal of the Pacific Cable that linked the continent to North America.

Inspired by a music box, a small town Vietnam vet carved an entire carousel full of animals by hand.

Fill up your senses in this beautiful riverside garden, dedicated to the works of singer-songwriter John Denver.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Lovingly nick-named the "Brick Dick" this municipal tower was winner of the World's Most Phallic Building Contest.

The fifth-longest natural arch in the world, and the longest outside China.

A striking lighthouse with views of the Gulf of Mexico and of a military air show.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

Ancient human remains unearthed around the iconic monument.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

Famously misunderstood wonder of the ancient world

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The world's tallest statue of an American hero.

An unrealized Taoist palace left abandoned in a Houston suburb.

The prototype for all Nazi concentration camps.