This charming woodland trail is peppered with poetry.

A beautiful, creepy 19th-century castle stands incongruous in rural Vermont.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

A benevolent, 16-foot-tall river dragon lives on a suburban lawn.

The system of air guns are fired off remotely to scare any trespassing avians.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The span is crooked and made from two older recycled bridges.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A wondrous old library overlooking the nation's capital.

The national park was once a plantation estate.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

The fountains of the U.S. Navy Memorial are annually salted with water from the Seven Seas as part of a nautical ritual.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A larger than life statue of a steelworker keeps watch over a closed steel mill.

A swirling spectrum of stained glass dazzles visitors who enter this subway station.

An ancient woodland that inspired a young J.R.R. Tolkien.

A pair of mysterious, unusually polished cave temples with an ancient gold legend.

One of the oldest continuously-operated gay bars in the United States is allegedly haunted by Truman Capote and Tennessee Williams.

The pristine waters crossing this forest form a hidden waterfall among the dense vegetation.