The gondolas let you glimpse a bird's-eye view of one of the world's highest capital cities.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

This lucky bronze frog was gifted to Madrid by a casino.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An ancient Egyptian temple in the middle of Madrid, Spain.

A former major munitions plant that has been converted into a sprawling art space.

An original apothecary from 1792.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Museum dedicated to awful artwork.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

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

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

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

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The maritime museum that boasts the largest nautical library in the western hemisphere.

The romance of early commercial flight still fills this Art Deco destination.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

At 207 feet, one of the world's longest continuous escalators.