The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

A brass plaque dedicated to a convicted cannibal hangs in the National Press Club, and that's not even the craziest part of the story.

The oldest continuously operating fish market in the United States.

This beautiful Miami garden was designed as a laboratory for tropical plants.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A crumbling hospital from the 1850s on Roosevelt Island.

Art deco landmark on the outskirts of Washington, D.C.

In the basement of the U.S. Capitol Building is a hidden storage room full of ornate floor tiles leftover from the 1850s.

This cavernous abandoned marble mine is popular with ice skaters in the winter.

The quaint little Vermont town played a quaint little Connecticut town in Tim Burton's "Beetlejuice."

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

New Orleans' famous cemetery, located on the site of a former race track.

Its collection is a sweet reminder of the shuttered factory.

A historic, century-old house plopped along the perimeter of Houston's ballpark.

This house proudly displays an interactive and continuously changing exhibit of lawn flamingos.

This huge repository of local history housed in an old J.C.Penney's is home to the largest model train set in Southeast Texas.

A quirky collection of old chairs fills a random vacant lot in suburban Texas.

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.