19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

The Boston square dedicated to the dark poet who was born nearby.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

Dim sum, served in a grand old theater.

A beautiful Victorian-era cemetery, complete with a miniature village.

This historic Boston building has gone from personal estate to porn theater and back again.

The behemoth beasts engaged in an epic battle is the second-tallest statue in the contiguous United States.

On a remote island, legend has it that a fiddler and his wife were turned to stone.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

The 5,000-year-old megalith is believed to be Scotland's tallest standing stone.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

A trio of giant megalithic stones in the middle of a golf course.

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

A stately castle in the northern Italian countryside has been restored after years of neglect.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

Nestled between a college and a golf course, the garden is home to more than 2,500 rhododendrons.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

The most isolated mailbox in America lets desert travelers record their passing.

At more than 5,000 years old, these structures are among the oldest free-standing stone buildings in the world.

After funding was cut for a memorial to the Danish author, the sculptor had his statue ceremonially lowered into the city harbor.

A small cave hidden deep within the Jenny Jump State Forest.

Because sometimes the most efficient route from A to B isn't a straight line.