Deep in the limestone cliffs of the Alabaster Coast, a German fortress built during World War II.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

This 16th-century tower house has a little hidden secret and a connection to an Apollo astronaut.

Location of the first public performance and singing of the "Battle Hymn of the Republic."

A home built and settled by a refugee of the Salem Witch Trials.

A pair of stone circles positioned on the bank of the River Esk.

This former outpost was designed to protect the lucrative fur trade of the 18th century.

Dedicated to the largest armed uprising in American history since the Civil War.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

A memorial for public executions that dates back to the 14th century.

Even though some of the buildings date back to the Victorian era, this research institute is still involved in cutting-edge astronomy research.

A stone monument acknowledging Scotland's right to have a separate Parliament from the one in Westminster.

Where the Border Reivers of the Johnstone clan used to hide their stolen cattle.

The second-largest giant sequoia in the world.

Fantastic stainless steel dragon gates complete with mesh wings.

These ruins saw a second life as a cemetery.

Designed to allow funerals to proceed over the River Dulnain.

This lighthouse sits within a glacial valley.

A 19th-century Neoclassical building now housing a Hindu temple represents modern-day Glasgow at its most multicultural.

This ordinary-looking rock may have played an important role in a 16th-century Scottish battle.

Designed by the company that provided water to the entire community.

A brother statue swap has adorned this building's facade for centuries.

Dedicated to the Father of the British Fire Service.

The tallest waterfall in West Virginia.