Half of a house.

Final resting place of Typhoid Mary.

Golden Gate Park's historic collection of plants.

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 semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

The home of aviation trailblazers, in a remote corner of the big city.

An artist's cute bronze subway sculptures belie his violent artistic past.

One-time largest man-made structure in the world will be a park in 30 years.

Adherence to strict Jewish laws is required to enter this ultra-conservative New York village.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Frida Kahlo's childhood home, now a museum of her life and works.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Stunning Roman aqueduct used for 1900 years and still standing.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Holding the most bodies of any cemetery in the United States.

100 massive sculptures in the Hudson River Valley.

A piece of outsider public art accompanied by a strange urban legend.

A trash dump made beautiful by nature's power.

The largest freshwater lake in the Florida Keys.

Three columns of volcanic rock shoot out of the ocean.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

Historic Hull Street was actually the first street with a proper name in the Boston area.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."