An urban laboratory.

The highest point in Texas is capped by a big silver pyramid.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

In Spain, the ruins of a Roman military camp sit along a flooded section of a river.

The upstairs reading room is packed with millions of rare books, literary manuscripts, and historical treasures.

Over a million items cram the shelves at Africa's largest shop of used and rare books.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

This ceremonial Mexican square looks as though it belongs in a science fiction movie.

The history of this futuristic crypt-turned-temple is as curious as its facade.

A small 12th-century temple surrounded by waters believed to have curative properties.

Vietnam's largest Buddha statue depicts a female sage.

A Christian monastery stands on what was once a holy Incan temple.

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

One man's remarkable private collection of art from around the world.

A monk-run winery inside a Buddhist temple celebrates Japan's crown grape varietal.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

An underwater temple submerged for 20 years has resurfaced with an extreme drought.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

An out-of-place grove of sequoias thrives in northern Spain.

China has many statues of the general and war god, but none are as epic as this.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

A unique rock formation that only a few have managed to venture inside.