The former home of the man whose radical ideas changed the nation.

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

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

Moscow's imposing monument to the Space Age.

Former headquarters of the KGB.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

A distinctive former power plant turned university lecture hall looks like it could make you breakfast.

The ruins of the second of three churches dedicated to the saint in a touristic Scottish town.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

Described by William Wordsworth as a "World of Wonder."

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.

Home of a 28-foot tall stalagmite known as the War Club.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

A building so large that it has its own weather.

This railroad and oil tycoon's lavish estate now stands as a time capsule of the Gilded Age.

Japanese gardens dedicated to the Japanese farmer that refused to throw in the trowel.

These constructed wetlands naturally filter millions of gallons of treated wastewater every day.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

In the parking lot of a fast food restaurant, a statue memorializing a prolific bull elephant.