An emerald-green grotto just a short trip from Austin.

Minimalist modern art on a repurposed military base in rural Texas.

This magnificent 18th-century hall consists of a maze of nearly a thousand interconnected passages.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

A deeply beautiful 15th-century stepwell with a tragic story.

Half-size replica of the Taj Mahal.

This abandoned stepwell is one of the largest, deepest, and certainly one of the creepiest in India.

Siddhartha Gautama sat here and received enlightenment.

The evocative ruins of a 1,000-year-old hill fort lie within a popular tiger reserve.

Nineteen ancient rock-cut Buddhist caves can be found on the outskirts of Mumbai.

At 8,000 feet, the world's highest tea estate draws visitors for both its products and its panoramic views.

The world's largest secondhand book market is a haven for bibliophiles and bargain hunters.

This 17th-century mausoleum is topped with an acoustic marvel.

An abandoned settlement originally established by British colonialists in the Andaman archipelago.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

The ancient water tanks remain some of the ruined city’s most beautiful architecture.

A nearly unconquerable island-fort in the Indian Ocean.

The largest tiger reserve in India is a vast expanse dotted with ancient ruins of Nagarjuna Viswa Vidyalayam.

An eclectic mix of influences rot together in harmony in this India necropolis.

A startling, centuries-old subterranean marvel hides in plain sight.

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.

A former bastion of Rajput chivalry, this massive hill fort is the site of legend and tragedy.

Modest by day, illuminated majestically at sunset.