Lie in a hammock where George Washington stood.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

How a century-old glass factory in Queens became a concert venue and arts center.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

A B.Y.O.B. Mexican cantina lives inside one of the last tortilla factories in Brooklyn.

A Wisconsin kitsch palace from the 1930s lives its second life in 21st-century Brooklyn.

This beautiful Brooklyn monument over a crypt memorializes a grim and largely unknown story from the American Revolution.

Now the site of a high school, this was almost the location of the largest cathedral in the US.

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

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

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

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

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

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

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

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

This unique house, the only one of its kind in Brooklyn, was built as part of a real estate developer's showcase.

A Collegiate Gothic quadrangle that surrounds an 18th century secondary school whose financing came from the likes of Alexander Hamilton and Aaron Burr, among others.

A serene, almost spiritual place to do one's business. Who knew a public toilet could inspire and awe?

San Francisco's oldest operating hotel, with a Victorian atmosphere and a "haunted" fourth floor.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."