Ruins of a German Castle on top of a towering stone pillar.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

Tucked in the back of this amazing antique store is an important piece of medical history.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

Silent memorial, using bone conduction to take people back to the Dresden Bombing of 1945.