The Citrus Variety Collection at UC Riverside contains two trees of each of the 1,000+ varieties of citrus.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

An art deco ice cream shop covered in vintage tiles.

One of the few beardless depictions of Lincoln, George Grey Barnard's 1917 statue was denounced by many—including Lincoln's own son.

A large visitor's complex and place of remembrance on the outskirts of the DMZ.

If you don't look closely, you might mistake this sculpture for just another passenger waiting at the airport.

No two pieces are exactly the same at Portland's hippo-themed hardware store.

Legendary DIY skatepark where Portland’s best skaters and curious onlookers gather daily.

A sculpture of a salmon swimming through a brick building.

Portlandia is the second-largest copper repoussé statue in the United States.

A bike being "eaten" by a tree is the real Vashon legend behind popular children's book, "Red Ranger Came Calling."

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

This playground sculpture of an icon from the past is dedicated to the children of the future.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

This strange statue features a bust of the famous composer plopped atop a woman's body.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

Qatar's oldest market can trace its origins back more than a century.

The place nearest Seoul where it’s easy to get a good look at North Korea.

Secret North Korean passage discovered below the world's most dangerous border.