Be on the lookout for the symbolic insect all over the city.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The ruins of the bathhouse used by the ill-fated last Aztec emperor still lie in Chapultepec Park.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

This small city park is best known for the nightly convergence of thousands of shrieking parakeets.

The phone booths in this English town have distinctly milky hues.

A mysterious "wedding cake" castle in the middle of the urban desert.

A self-built castle made by a mysterious man.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

A legendary speakeasy bookstore returns from the brink.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

More gold than anywhere else, ever.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

New York's oldest magic store.

A crumbling hospital from the 1850s on Roosevelt Island.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

This hulking behemoth is actually five interconnected towers built in the 1960s.

This naval gun is fired every day at noon, an odd timekeeping tradition the origin of which is local legend.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

Taoism, Buddhist and Confucianism are all represented in this temple that claims to answer anyone's wishes.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.