In Old Goa, the former residence of the archbishop now houses a permanent exhibition.

This cemetery in Velha Goa was once the site of several historical religious buildings.

The first project by the Bureau of Reclamation illustrates both the upsides and downsides of reclamation.

Red ocher pictographs survive in this tufa rock shelter on the shore of an ancient lake.

The castle that provided the setting for much of 'Monty Python and the Holy Grail' is now a pilgrimage site for fans.

The raised stones in the middle of this road through Culross are relics of a 17th-century class divide.

A little-known, but surprisingly large waterfall on the Little Truckee River in the northern Sierra Nevada.

A Native American petroglyph, the site of an emigrants' waystation, and the ruins of an early 20th-century sheep camp are all found at this crossroads.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

An architectural oddity hides in plain sight on this iconic London bridge.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

There's an exclusive Beefeaters pub hidden in the Tower of London.

Where condemned pirates met their grisly end at the gallows on the River Thames.

Pop culture has helped to keep this iconic British building from being destroyed.

Scattered throughout London are ancient remnants of the city's former bounding wall.

One part local history, 99 parts gruesome haunted house.

The world's longest continuously running show has played at this small West End theater since 1974.

One of the "twins" in these falls on the Snake River was sacrificed for hydropower generation in the 1930s.

US-50 in Nevada is known as "the Loneliest Road in America," but this earlier iteration of the route is even lonelier.