The longest hedge maze in the world.

This section of the Kennet and Avon Canal has been designated the same level of heritage protection as Stonehenge.

The geoglyph once sported a glass bottle eye.

A chalk horse cut into an English hillside in the 19th century.

Legend says this ancient pagan site can cure all ailments.

These picturesque ruins crumble beautifully into the ocean.

Perhaps the only prehistoric monument with its very own public bus stop.

The twists and turns of this serpentine maze are over 170 years old.

400-year-old garden, restored to beauty.

The largest greenhouse in the world is home to over one million types of plants.

Puzzles within puzzles hide a golden treasure in this hedge maze.

Every year locals tumble 650 feet down to the bottom of the hill chasing a Double Gloucester cheese.

There are hundreds of secret WWII bases hidden in British forests. Built to fight a Nazi invasion, they remained unknown for decades.

One of the tallest waterfalls in Africa is also home to a population of monkeys who enjoy the waters and the occasional guest.

Where, exactly, the great aviator completed her transatlantic flight has caused some trouble in Wales.

A section of a historic wooden trestle viaduct is preserved next to the railway line it once carried.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

A subterranean display of public art and architecture.

This airport currywurst stand is made out of retro airplane parts.

A giant snail sculpture looking longingly at the German traffic museum.

One man's personal kunstkammer, museum and shop.

The ruins of an early-18th-century complex that could once house up to 12,000 horses.

The rusting hulk of a hand-powered, nearly 160-year-old submarine abandoned in 1869 due to the ravages of decompression sickness.

Right angles in the forests of Panama.