Glass and concrete building designed by Albert Kahn.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

Toxic waste disaster that founded the Superfund program.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

This abandoned ironworks was once the most important military supplier in America.

The site of William McKinley's tragic assassination is only marked by an underwhelming boulder.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

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

A collection of Witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.

This collection of Japanese luck idols beckons visitors with over 2,000 waving paws.

Locals place their offerings on this nightmarish gnarled tree so the witches won't summon another storm.

This 19th century mansion façade adorned with immigrant patriotism is a symbol of Louisville’s history.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

The most accurate timepiece in the world.

A hoard of sky catalogs, astrophysical journals, even the works of Galileo and Copernicus.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

A derelict bit of transportation infrastructure hidden in the woods.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

Rare recess caves fill this unbelievably beautiful Ohio park.

The largest earthwork effigy in the world.

An abandoned relic of the city's failed experiment with below ground transit.