Legends say that this Art Deco apartment building almost became Hitler's British headquarters.

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

This ancient Egyptian obelisk still bears the wounds of World War I.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

Lumps of significant stone from around the world surround a flaming monument for peace.

One of the great math minds of the 17th century is underfoot in this 900 year old Dutch church.

A 14th-century church holds a unique monument to a German mathematician who dedicated his life to calculating the value of pi.

Graffiti covers the walls of a room where university students through the centuries have waited nervously to defend their theses.

Devious political maneuvering and four ancient, working telescopes are central to the world's second-oldest observatory.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

People have been placing babies on these lilies for photoshoots since the Victorian era.

A former plague hospital turned medical museum.

Science meets wall art to highlight the beauty of famous mathematical equations.

A memorial commemorating the man whose name became synonymous with taking a picture in the Netherlands.

This institution has been serving up some of the best pancakes in the Netherlands for over a century.

Where royalty waits in the height of luxury.

A beautifully eclectic mix of architectural styles.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

Mile-long cave system near Great Smoky Mountains.

Inside the Wayne County airport is an amazing collection of lights and sounds.

The last remnant of a tree that helped prove to the world that sequoias are real—and they’re spectacular.