A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Home to items never before seen by the public.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

One Confederate statue that accurately reflects the ugliness of its subject.

This replica of the Greek structure is in the heart of Nashville.

Come for the flowers, stay for the bats!

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

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

This indoor ski resort has a mountain contained inside a mall.

"Girl in a Wetsuit" is what happens when a sculptor has to find a way around a 100 year old copyright.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

The little-known second castle that William the Conqueror built in York.

A century-old tradition has culminated in a small but singular collection of feline effigies.

Follow the original medieval paths that wind through this intriguing section of the city.

Be on the lookout for the symbolic insect all over the city.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.