Triangular House built on a leafy residential street in St. Paul.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

Museum with an extensive collection of Cray supercomputers and related artifacts.

A town filled with hot chocolate, dazzling lights, and lots of Christmas cheer.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

Gambling, boozing, and yodeling animals cover the walls of this dive bar cum natural history museum.

Hidden away in the city of Madison, Wisconsin is a nearly forgotten home that Frank Lloyd Wright built for a childhood friend.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

One of Frank Lloyd Wright's final works was this UFO church.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.

Early prototype for Frank Lloyd Wright's Guggenheim.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

Most famous work of one of Frank Lloyd Wright's sons.

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

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

The notorious headquarters of a corrupt political machine.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

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

New York City's only preserved family home from the 19th century.

Walk into the 19th century without leaving Brooklyn.

The Underground Railroad passed right through this historic Brooklyn Heights church.