A living memorial to the trees London lost during the Great Storm of 1987.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

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

Giant, friendly pelicans in Central London, the most unlikely of places.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

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

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Legend has it that seven Anglo-Saxon kings were coronated on this stone, located in the appropriately-named town of Kingston.

A gallery specifically dedicated to the botanical illustrations of a remarkable traveling lady.

These 90-year-old murals of local kings, Vikings, and outlaws hide in plain sight in a beautifully baroque shopping arcade.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

The English Civil War began right here in 1642.

When the public was consulted about a new piece of street art, they naturally asked for an enormous metal dragon.

Held in a fort that once stood for colonization of the area, this museum now tells the history of its indigenous people.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

This ironic war memorial thumbs its nose at a campaign of inedible humanitarian aid food products.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

This unique museum focuses on the Siege of Sarajevo through children's eyes.

A monument on the pavement marks the spot where two cultures that shaped Sarajevo come together.

The place where World War I began.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

The first mosque in the world to receive electricity.