The only surviving building of historic West Boylston, which was flooded to create the Wachusett Reservoir.

A statue commemorating a 16-year old girl's nighttime ride to raise a militia against attacking British troops.

This statue commemorates the importance of hat manufacturing to Danbury, once known as the "Hat City of the World."

Home of the only civilian casualty at the Battle of Gettysburg.

The oldest surviving presidential residence in the United States.

Memorializing an American tragedy of massive proportions.

America’s smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

An abandoned Victorian-era mill in the middle of modern Manchester.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

The most confusing clock in New York.

Red frames showcase remnants of one of New York's original subway stations.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

One of the world's first dedicated bank buildings in the world is now the oldest one.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This German museum is devoted to all aspects of grave culture from headstones to coffins.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This roadside wonder is as mysterious as it is beloved.