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.

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

The medieval woodcut-style artwork chronicles life in medieval London.

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

England's most famous front door has an accidental doppelganger.

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

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

A tongue-in-cheek arcade where the games are based on everyday life.

These Neolithic burial mounds and a still-intact passage tomb may have solar calendar significance on the spring and autumn equinoxes.

An ancient neolithic tomb that only sees the sun twice a year.

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

Created by four famous men, the beautifully designed Buffalo State Asylum was resurrected as a hotel and art center, but still boasts a ghost story or two.

The only boathouse Frank Lloyd Wright ever designed was also the only unbuilt structure in his famous Wasmuth Portfolio, until 2007.

An elaborate memorial to a man local legend says died of a broken heart.

The London statue that imitates passersby.

The first and only American institution dedicated to the enduring value of comedy in the United States.

This collection honors the iconic, and proudly American lighter that just won't quit.

This museum pays tribute to the largest group in the Iroquois Confederacy.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

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

These ornate arches show how the course of the River Thames has changed.

This coffee shop lies hidden beneath a historic church.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

Walking around West Harlem reveals a scavenger hunt of beautiful bird murals.