Fortified medieval tower house with lovely roof garden.

This hill is all that remains of Cambridge’s former castle.

This sculpture pays homage to Shakespeare and his reference to a Manningtree tradition.

This ancient oak tree sheltered accused "witches" in the 17th century.

This crumbling coast and its teetering tower are literally filled with history, but they are also at great risk of becoming history themselves.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

London's smallest police station is barely the size of a phone booth.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

England's most famous front door has an accidental doppelganger.

Its collection includes a broad array of social, geographic, graphic design, and political history.

The head of a legendary lumberjack watches over a river in Maine.

The grave of Mary Nasson is shrouded by witchy legends.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

Created by a local artist, these quirky sculptures each have their own names and personalities.

This bronze sculpture was inspired by a photograph of Martin Luther King Jr. and his wife embracing after he won the Nobel Peace Prize.

Dedicated to a colonial woman who was hanged for being a Quaker.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

Dedicated to one of the darkest moments in Irish history.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

A former waterfront market is now in the center of town due to some interesting Boston engineering.