The pretty iron lamp is a reminder of the architecture underneath London's streets.

This traditional Japanese-style house doubles as one of James Turrell's colorful works of art.

The building features one of the last remaining free-floating spiral grand staircases in the U.S.

On a stretch of Danish coast known as "Cold Hawaii," this fishing village has become a surfing town.

The final home of the legendary Danish sailor said to have lived to be 146 years old.

The house where a Danish physicist discovered the connection between electricity and magnetism.

The world's oldest bookshop still in operation.

Turkish adventurer antiques in the heart of the Grand Bazaar.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

This fortified sand barrier dividing a contested territory is the longest minefield in the world.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

Village of slate houses, built on a white marble outcrop.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

This massive library holds what was once the largest book collection in the world.

The forgotten remnants of a land-to-sea cable car that was once unique in the world.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

This small patch of land is the final resting for these communication relics of the past.

This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.

Commemorating the spot where the famous scientist fed his pigeons.

Designed as a labyrinth, this subterranean prison was crafted without bars or doors.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

This quiet bird sanctuary on the Danish coast is home to something not usually found in a conservation area: hunters' cabins.

This sublime architectural marvel is a rare example of an expressionist church.