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

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

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.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

One of the remaining markers of an era when Brooklyn and Flatbush were separate cities.

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

This secluded ruin was once a home for exotic plants.

Sniff the Titan Arum's rotting flesh.

This neo-Gothic former auto showroom is one of the few remaining reminders of Brooklyn's "Automobile Row."

Headquarters of the world's fourth largest Hasidic sect and the first of many "770s" around the world.

The ballpark in "Pigtown" where the Brooklyn Dodgers made their name was replaced with a huge apartment complex.