This little-known wall in Southampton stands as one of the most unique and personal monuments to D-Day.

Now a memorial to merchant sailors and Titanic victims, this medieval church was destroyed by bombing raids in 1940.

This 700-year-old storehouse was a POW jail, aviation workshop, and Titanic memorial before becoming a brewpub.

Many mysteries surround these objects questioning whether they are cannonballs at all.

The rusting relics of Southampton's former luxurious flying boat industry.

London’s first road overpass is so old that it was originally built for horse-drawn carriages.

One of London's lost rivers runs through a pipe over the tracks of this subway station.

A haunting monument dedicated to the Royal Naval Air Service and the Fleet Air Arm.

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

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

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

A unique tribute to the millions of animals who served and died for the British military.

The world's largest frame offers spectacular views of the city's past and present.

This artificial archipelago was supposed to resemble a map of the world.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

An abandoned Sultan's palace in the middle of a park next to one of Singapore's most popular tourist spots

After immigrating to Paris in the 1970s, two brothers from Laos built a grocery store empire.

This little visited park is a treasure trove of ancient Roman ruins.

First point in the Struve Geodetic Arc, a 19th century undertaking to measure the Earth's size and shape.

Late Mesolithic settlements and Bronze Age burials have been excavated at this ancient woodland on the top of a hill.

This breathtaking monastery was established by Saint Benedict himself 1,500 years ago.

Italy's only urban waterfall has enchanted artists and travelers for centuries.

This elaborate banquet hall in Queen Victoria's summer residence is an homage to Indian architecture, including miniature models of palaces in India.

Hundreds of huge, centuries-old horseshoes adorn the walls of this nontraditional 12th-century castle.