A limestone wonderland of water and subterranean secrets.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

Striking, enormous gold-plated sculpture of Buddha installed in the 19th century.

Bangkok's take on the High Line is a park on a traffic bridge above the iconic Chao Phraya River.

A monument completed by a Third Reich sculptor in 1935 in Ankara's central park encourages Turks to "be proud, work hard, and have trust."

One of the earliest Ataturk monuments commemorates the victory of the Turkish War of Independence.

The ruins of a Roman temple from 1st Century BC with the only preserved inscription of “The Deeds of the Divine Augustus.”

Resting place and mausoleum of the founder and first president of Turkey.

This 3,000-year-old “opium black fortress” towers over the ancient town named after it.

This large Roman bath complex offers a window into ancient life in the arid Central Anatolian steppe.

A massive marble pedestal is all that remains of a column that towered over Constantinople for 1300 years.

The only Roman honorific column in Istanbul.

This elevator was built in 1907 to connect two neighborhoods separated by a steep, rocky cliff.

An underground network of massive stone arches and their skylit vaults support ruins of portico structures above.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

A section of the long chain that blocked enemy ships from entering Constantinople.

Over the centuries, this island paradise has done it all, from providing monks with ecclesiastical respite to sheltering an exiled Leon Trotsky.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

A deadly ancient portal to the underworld.

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

The only example of a Paris Métro sign in use at a subway station outside of the French capital. 

Montreal's colorful subway station shows its support of the local LGBT+ community.

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.