This woodland architectural installation acts as a camera obscura for the heavens.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

A huge musical instrument played by the ocean.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

A submerged archeological park still holds the wonders of a Roman Sodom.

This tower was constructed to commemorate the man who helped bring true democracy to the United Kingdom.

A treasure trove of astronomical, mathematical, and scientific instruments at Cambridge University.

Vast fan-shaped British cemetery honouring American servicemen lost in World War II.

Once-buried markers show England’s lowest land point keeps getting lower.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

Where Venice's gondolas go for a tune-up.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

The plague quarantine island home to the alleged "Vampire of Venice."

Go inside to really appreciate this 500-year-old technological masterpiece.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.