A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

See no evil, hear no evil, speak no evil.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

The fragmented remains of a massive public bath connected to the city's water supply.

The site of a popular piano lounge owned by a former world champion boxer is now a place to rent a truck.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

The ruins of a 12th-century Cistercian monastery can be found alongside World War II tank traps and pillboxes.

A unique museum dedicated to culture and artistry of carpet weaving.

This statue once earned the distinction as one of the "Three Major Disappointments of the World."

This hill and tower are steeped in legend, from King Arthur to the Holy Grail.

The Great Fire of London and the regulation of one-way streets both started in this alley.

This beautifully restored fortification kept the city safe for centuries.

This ancient castle has been abandoned since the Edwardian conquest of Wales.

Once the main gateway to Tokyo, sneaking through this checkpoint was a capital offense in feudal times.

This memorial is dedicated to the legendary suffragette, who stepped in front of the king's horse during the Epsom Derby.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

This granite mountain is the largest rock in Africa and the second-largest monolith in the world.

This stretch of the River Severn where large waves flow against the current is the birthplace of river surfing.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

A striking symbol of the Bulgarian capital.

A curious cave church carved into the face of a cliff.

A marine aquarium with an astounding variety of fish hides in the basement beneath the famous Palm House.

A replica of the steam engine that hauled Queen Victoria's Royal Train is on display at Windsor.

A menagerie of curiously bred creatures.