An architectural oddity hides in plain sight on this iconic London bridge.

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

Hear the quietest sound from across the dome.

It's said this was once the home of King James V's pet lion.

These formal gardens were designed to be admired from the vantage point of the castle.

A brutalist gem towering over the heart of Milan.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

The first English fort built in India.

This Gothic-style church is reputedly built atop the remains of one of Jesus's apostles.

This precariously balanced boulder is said to be a hunk of stolen butter dropped by the gods.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Bird dung painted this huge boulder which in turn inspired the name of a city.

"Girl in a Wetsuit" is what happens when a sculptor has to find a way around a 100 year old copyright.

After the devastating 2011 earthquake, historic Christchurch begins to recover, starting with the pop-up Re:START mall.

This faded sign to nowhere is a beloved icon in New Zealand.

Fire meets ice at the southernmost volcano on Earth.

Dozens of rockets and missiles are on display outside a testing facility in the Utah desert.

This Moab institution functions as both a rock store and a small natural history museum.

These tall, red sandstone pinnacles outside Moab are often forgotten amid their more famous neighbors.

A crack flared at the base provides a pathway completely through a sandstone ridge near Moab.

At this gas station in the middle of the desert, a convenience store has been carved directly into the rock.

This lonely gas station has stood at this location since 1917.

This granite monument at the site of an ill-conceived tourist attraction is built from the same stone as the Mormon Temple.