The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

There aren't too many operational funiculars around, but Pittsburgh has two!

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The only sea in the world that has no land boundary.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

The unbelievably opulent home built for an infamous newspaperman.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

The "Seinfeld" diner.

Steinbeck's old stomping grounds, immortalized in Cannery Row.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The mysterious large white cross visible from the runway is a memorial to a massacre during Spanish Civil War.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Formerly the most gerrymandered district in the U.S., it twisted and turned along racial borders.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.