An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

A blooming house of worship for the masses.

Impossibly life-like natural history models created out of glass by a father and son.

Three prestigious academic collections come together to create a world-class natural history museum.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

This landmark cemetery in Boston was created more than 300 years ago.

The site of Paul Revere's historic two lantern warning.

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

An otherwise quiet campground becomes a bustling medieval town for two weeks every year.

The former estate of the Guggenheims, part of the opulent Gold Coast that inspired the Great Gatsby.

An eccentric playboy's astounding natural history collection.

An unrealized dream to wirelessly electrify the entire Earth.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.