An accidentally hidden library containing the ephemeral history of New York.

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

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

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Unrepaired walls from a 1920 anarchist bomb attack.

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

Currently housing a corporate bank branch this building at the southern tip of Manhattan was once the gateway to luxury vacationing.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

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

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

The skeletal frame of a decommissioned gas-pumping station offers breathtaking views of greater Berlin.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Tourists often confuse this beautifully ornate former cigarette factory for a mosque.

This church was transported brick by brick from the ruins of a 16th-century city into Panama City's current historic district.

This medieval village clings to a cliff in southwestern France.

Historic medieval fortified city in southwest France.

A medieval church with largest and oldest collection of Renaissance frescoes in France.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

Hunt for buried treasure in Nova Scotia.

The smallest post office in the United States is no bigger than a broom closet.

This Ocean Drive crosswalk has been paved in rainbow colors to honor the LGBTQ+ community and the man who brought pastel to Miami Beach.