The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

A once grand hotel is being retaken by the wilderness it once capitalized on.

This magnificent Cincinnati graveyard is also a popular public park.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

This two-room shotgun shack in Tupelo is the birthplace of a King.

The most decorated dog of World War I is preserved in the Smithsonian.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

Elevated freight railway turned wildly successful urban park.

Memorials and tributes scattered across the university grounds remember a famous national tragedy of the Nixon era.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

Mansion and shopping center used in the 1975 film "The Stepford Wives."

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

At 207 feet, one of the world's longest continuous escalators.

Failed state-supported institution meant to rehabilitate students with intellectual disabilities.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

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

Eternal resting place of the grave robber and murderer who served as inspiration for many of cinema’s famous madmen.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.