One of the few places where you can explore a 1918 paddlewheel steamboat from stem to stern.

The oldest Hindu temple complex in Nepal serves as the seat of Nepal’s national deity, Lord Pashupatinath.

This historic square in Nepal is home to temples dating back to the third century.

This elegant neoclassical garden is a peaceful oasis in the middle of the Nepalese capital.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

Rare recess caves fill this unbelievably beautiful Ohio park.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.

Stolen goods adorn the organ at Old North Church.

Named after the Goddess of Harvests, Annapurna is the deadliest member of the Eight-thousanders club.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

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

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

A mysterious "wedding cake" castle in the middle of the urban desert.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

Nordic giants resurrected from the sea and restored to their former greatness.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

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

A beautiful geyser under environmental threat.