The first piece of public art dedicated to LGBT rights.

The most confusing clock in New York.

There must be a pun in this haystack somewhere...

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Elevated freight railway turned wildly successful urban park.

The massive gardens and office of a Brazilian sculptor.

A Tudor-style castle in Brazil holds one of the world's largest armory collections.

This kilometer-long university building is an unexpected architectural delight.

The most unusual block in Brasília.

A stunning Catholic cathedral built by a curve-loving communist in Brazil’s newly created capital.

Part of one of the largest flooded cavities on the planet, and littered with prehistoric animal bones.

After millennia of erosion by sand and churning water this Brazilian valley now looks like a lunar fantasy.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

An overlooked memorial honoring the local Washington residents who died in World War I.

The oldest continuously operating fish market in the United States.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."