The remains of the second-oldest zoo in Europe can be seen within these library gardens.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

This lucky bronze frog was gifted to Madrid by a casino.

The lengthy skeleton of one of the tallest Spaniards of all time is on display in Madrid.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

Commonly acknowledged as the only public monument to the Devil himself.

A lush indoor jungle fills this bustling Madrid transportation hub.

An ancient Egyptian temple in the middle of Madrid, Spain.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

This mini version of the famous Bohemian castle was lovingly built by a Czech immigrant and mineworker.

This pair of Australian "waterfalls" appear to be falling straight across the land.

These flying foxes dangle from the trees around the library like fuzzy black fruit.

The first declared National Monument in the United States.

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

A monument to the center of the North American continent may be off by a few miles.

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

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

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

Enter the Forest of the Elves.

A fence constructed completely of skis on Monroe Street.

A treehouse assailed by the elements and the government, now gone.

A six-story-tall golden pyramid, surrounded by a moat.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.