Places abk1974 Wants to Go

These former ticket office windows in London's underground now house pocket-size parks.

This cave complex might provide a link between the Neolithic and the Classical Greek period.

Two ancient yew trees with a chapel and an altar built inside their hollow trunks.

A rare 18th-century heating system tucked inside a historic colonial home.

This Rocky Mountain mansion was the luxurious home of the authoritarian leader of a company town.

The oldest continuously-operated inn in the United States, once owned by Henry Ford.

From a supper club to a gay bar to an HBO shooting location, this 125-year-old Victorian mansion has lived many lives.

Vermont's hills are alive with the sound of music at this historic hotel.

This house covered in small stones was the work of one man over the course of nearly 30 years.

A New York–based physician returned home to Spain to build his own elaborate monument to Christopher Columbus.

A medieval castle in the middle of rural Texas.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

The aviator lived here from 1924 until she became the first woman to cross the Atlantic by airplane in 1928.

This four-story steel sphere in Maryland was used to test biological weapons.

This hidden treasure provides a charming access point along the south side of Baker Park.

An antiquarian horologist’s mysterious home in Old Goucher.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

The remains of a 13th-century Norman fortress, largely destroyed by an explosive renovation.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

A real-life Professor Snape once taught in this Welsh university building, which students of course nicknamed “Hogwarts.”

The niches over the western entrance of Westminster Abbey honor individuals from the 20th century who gave their lives for their Christian beliefs.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

The ruins of a once-mighty medieval palace are hidden away in otherwise modern London