More gold than anywhere else, ever.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A whimsical village of unique treehouses resides in a Washington forest.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Odd outsider art installations surround a Gold Rush-era ghost town.

Famously misunderstood wonder of the ancient world

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

A modernist landscape of water and sci-fi concrete.

Sniff the Titan Arum's rotting flesh.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Read a book next to a Midtown waterfall.

A beautiful geyser under environmental threat.

Hidden beneath the streets of London is a secret subway that only carried mail.

A dilapidated dock tells the story of Titanic's missed arrival.

Eighty million natural history specimens call this gargantuan museum home.

The first declared National Monument in the United States.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A lush green oasis in the middle of Chicago.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.