The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Ship-sized kinetic sculptural fantasy.

An architectural oddity hides in plain sight on this iconic London bridge.

An unreal vintage shop that wears its dadaist influence on its zombie fish.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A meditative space out of a fantasy story.

Explore 10 acres of environmental sculptures.

A regular looking rock with an unbelievable history.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Pay your respects to a folk-punk legend.

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

Hidden behind a gate in Greenwich Village is a little farmhouse that once served as the writing studio of a bestselling author.

A 19th-century Baja cantina that many say is the birthplace of the margarita.

Walk into the 19th century without leaving Brooklyn.

The only subway station in the city that still makes use of gap fillers.

Red frames showcase remnants of one of New York's original subway stations.

The oldest living tree in Manhattan comes shrouded in sinister legend.

The site of the deadly Triangle Shirtwaist Factory Fire.

Love is in the air along the small street in Brooklyn.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

This skeletal, unfinished Gothic church once housed a miraculous masterpiece by Raphael.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.