A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.

The oldest working bell set in North America, the bells at Old North Church sat silent for their first four years in Massachusetts.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

This tablet indicates where the tragic monarch returned to begin her tumultuous downfall.

A six-ton wedding present for the King of the Scots.

The most loyal of little dogs, or a Victorian era publicity stunt?

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

One of Ireland's most infamous prisons for rebels including men, women and children.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

Rare recess caves fill this unbelievably beautiful Ohio park.

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

Visitors to this library are in for a real-world education in modernist architecture.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Try your hand at old-fashioned coffee growing at this museum devoted to one of the world's most coveted beans.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

Submerged lava formations create incredible waterworks.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

Watch the newest land on the planet form before your eyes.

This black shoreline is made up of exploded lava particles.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.