Part of an abandoned19th-century fortress hides in plain sight inside a modern office building.

One of the best-preserved, yet least visited stone circle sites in Cumbria.

The highest peak in all of England is plagued by dangerously fickle climate shifts.

This 17th-century pub once had a hole in its wall so the neighboring blacksmith could easily access beer.

A repurposed railway tunnel with otherworldly acoustic characteristics.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

This vintage gem is one of the oldest surviving purpose-built movie palaces in Scotland.

The heads of two giant mythological water horses honor Scotland's horselord past.

A giant pineapple, a symbol of hospitality, and an amazing vacation rental option.

Where the sleeping monsters of Scotland's oil industry are left to rust.

An extraordinary collection of scientific instruments - and Einstein's chalkboard - inside the world's oldest purpose built museum building.

One of Europe's oldest libraries.

Oxford University's stateliest library seems designed to make students truly feel the weight of knowledge.

An abandoned World War II tank left to rust in the downland.

Warsaw's fantastically preserved gasworks...almost.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

One of Japan's most famous sights, the bridge was originally built in 1673.

This bridge is so steep it looks like a rollercoaster.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

Crawl through the hole in the middle of this stone to break off a bad relationship or initiate a good one.

Sulphuric gases inhabit a beautiful Japanese island.

Giant sand sculptures of famous people and places are on display near the Tottori sand dunes.

Twelve hundred stone carvings guard this off-the-beaten-path Buddhist temple.