This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Originally a cemetery, this city park remains speckled with a handful of scattered gravestones.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Alexander Hamilton’s creation caused quite a bit of controversy.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

The most loyal of little dogs, or a Victorian era publicity stunt?

A book bound in the skin of an infamous criminal, along with countless other specimens.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

360° views of the city plus five floors of optical illusions and hands-on science.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

This one-block alleyway is stuffed with street art that is colorful, cultural, and intensely political.

This 19th-century church is now a popular roller rink.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

Golden Gate Park's historic collection of plants.

San Francisco's newly reopened hands-on science museum.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.