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

A black sand beach where glacial fragments wash ashore and look like sparkling diamonds.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This beautiful, historic church looks like something out of a simpler past.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

The summer tourists on these cliffs are thousands of seabirds.

The largest whale museum in Europe allows visitors to walk among life-size giants.

This stunning concert hall has become a symbol of Iceland's national recovery.

This secluded walkway overlooks a magnificently wild London green space.

An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

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

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

This hand-painted advertisement is a literal sign of encouragement, however unintentional.

Murals of the wild parties once held on the frozen River Thames.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

Hear the quietest sound from across the dome.

Over several decades, one of London’s most iconic city gates was dismantled, moved out of the city, and then moved back.