This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

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

Current docking place of the SS United States, the fastest transatlantic ocean liner.

The only known Futuro house in North Carolina sits along a stretch of desolate highway on the Outer Banks.  .

Jule Körner's house full of bizarre architectural details.

This historic mansion was built as a symbol of love between a husband and wife.

A "hospital" where people went to be quarantined, die, and be buried in the yard.

A quintet of history museums make this Virginia graveyard as much a resting place for funereal history as it is for people.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

Arlington Cemetery exhibit dedicated to death and grieving.

A rare view of a preserved Victorian science museum.

The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

Test your business savvy and play the market for cocktails at this stock exchange-inspired watering hole.

Rummage through this sunken ship, but leave your scuba gear at home.

An unassuming secret door once led to a legendary watering hole.

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

Little Red Lighthouse under the George Washington Bridge.

Unrepaired walls from a 1920 anarchist bomb attack.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

Villas that once served as playgrounds for the rich now fall away in decay.

First museum dedicated to the research and history of Epilepsy.