This unusual apartment building may be Brooklyn's own version of the Leaning Tower of Pisa.

A beautiful collection of architectural ornaments rescued from demolished New York City buildings.

This metal eagle one of the final remnants of a newspaper that wanted to keep Brooklyn to Brooklyn.

This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

This secluded ruin was once a home for exotic plants.

The site of a fallen tree that protected Americans from British forces during the American Revolution.

A tree that grows parallel to the ground was declared Brooklyn's "crowning curio" by the poet who saved it.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

19th century cemetery hidden in Brooklyn's Prospect Park.

The real "father of baseball" rests in Brooklyn.

A curious friendship between two inanimate ladies.

One of the best examples of the modernist movement in Madrid.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

A guitar mounted on a wall in Temple Bar honors the Irish musician.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A lush indoor jungle fills this bustling Madrid transportation hub.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

Originally built to monitor fishing, this Victorian tower now educates visitors about the local salmon industry.