Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

This impressive clifftop temple was once at the center of an international custody dispute.

Postal archives over 150 years old offer a window into Singapore's culture and tradition.

A battle between nature and architecture in the Cambodian jungle.

This $62 million dollar temple was erected to house one little dental fragment of religious history.

A Buddhist theme park brings you a Buddhist version of Hell.

Singapore's landscaping project is home to 18 incredible Supertrees.

Its collection includes a broad array of social, geographic, graphic design, and political history.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Public access to clean drinking water was an instant hit among the masses.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

Scattered throughout London are ancient remnants of the city's former bounding wall.

London's smallest police station is barely the size of a phone booth.

Eighty million natural history specimens call this gargantuan museum home.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

This tiny island is home to the world's largest colony of Northern gannets.

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.

The last manually operated turntable ferry in the world.