Explore the dark underground corridors of this graffiti-covered former military fortification.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

A beautiful Gilded Age hotel in the White Mountains with surprising diplomatic history.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

This historic observatory contains the world's oldest refracting lens telescope.

Though considered an eyesore by some, this boxy Brutalist high-rise plays a significant role in Sydney's past.

Come for the flowers, stay for the bats!

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

An elaborate, hidden model train in the Needham Town Forest.

Commemorating the 1948 creation of the Jimmy Fund, a Boston-based cancer charity.

This hotel was the site of major events in sports and radio history. It was also used as a detention center during World War II.

The location of one of the first private Catholic schools in the country, providing a valuable sanctuary during the tumultuous period when Protestant and Catholic students were at odds.

What may be Boston's finest Art Deco building, located in the city's Financial District.

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

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

This historic patch of real estate offers a glimpse of colonial Boston.

A men’s restroom became a sandwich shop.

The last remaining 19th-century tenement from Boston's old West End neighborhood.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

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

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.