This massive redwood tree has stood in Northern California for nearly 2,000 years.

The small burial plot is located in a mall parking lot.

This elaborate High Victorian Gothic structure is one of the world's few 16-sided buildings.

Eat first, shop later at this eatery within an Asian grocer.

A tiny town in an empty lot was the work of a local eight-year-old.

The self-proclaimed world's smallest museum, located next to a Massachusetts sandwich chain.

This tower commemorates the spot where George Washington hoisted the Grand Union flag.

The small alleys in Lübeck's Old Town are a result of medieval urban sprawl.

Twelve sweet, nutty, life-sized statues are housed in this second-story shrine to almond paste.

A stunning two-story timepiece within a medieval Brick Gothic church.

The bells remain in a shattered heap exactly as they fell when the church was bombed in World War II.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

A spitting ode to a German serial killer.

Eight naturally mummified bodies in glass coffins are housed in an underground crypt.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

One of the oldest wine cellars in Germany is now a restaurant beneath Bremen's town hall.

This German museum devoted to the simple wonders of salt is actually built over an old saltworks.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

Impossibly life-like natural history models created out of glass by a father and son.

Three prestigious academic collections come together to create a world-class natural history museum.

This plaque commemorates the call between Alexander Graham Bell and Thomas A. Watson.

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

This plaque is dedicated to one-half of the Magliozzi brothers and their hit radio show, 'Car Talk.'