I traveled Singapore vs I traveled to Singapore

Some examples from the web:

• And that night, Mike and I traveled the world.
• My uncle said those words to me when I traveled to Karakorum.
• I traveled by foot for hours before I was rescued.
• That's the last time I traveled anywhere.
• I traveled to Earth from my home planet of...
• I traveled the world without a destination.
• I traveled on foot for two weeks in a row.
• I traveled to South America with my family and assisted in a ritual sacrifice.
• I traveled 500 miles to give you my seed.
• I traveled halfway around the world via satellite.
• I traveled quite a bit then settled in Milan.
• I traveled a lot when Cailin was young, too.
• Nick, I traveled from the future to find you.
• When Jake was a baby, I traveled a lot for work.
• And Hal and I traveled everywhere.
• I traveled a lot for business as a young man.
• I traveled a lot before I came back to d.C.
• In 2007, I traveled to three war zones.
• I traveled to Iraq, Afghanistan and Liberia.
• I traveled halfway around the world.

Some examples from the web:

• My uncle said those words to me when I traveled to Karakorum.
• I traveled to Earth from my home planet of...
• I traveled to South America with my family and assisted in a ritual sacrifice.
• In 2007, I traveled to three war zones.
• I traveled to Iraq, Afghanistan and Liberia.
• I used to send him a postcard from every city I traveled to for work.
• So, I traveled to my family ancestral home in Scotland where I made an astonishing discovery.
• That day, after making my excuses at home, I traveled to the Ministry of Time.
• I traveled to the scene to examine the 419.
• For my exam grade, I traveled to Central America and did my thesis on the struggles of refugees from Guatemala.
• I traveled to this country in Genghis Khan's holy crypt... to absorb his power.
• I traveled to your old home to get these.
• This past January, I traveled to a place called WAIS Divide, about 600 miles from the South Pole.
• And I experienced this most viscerally when I traveled to remote villages to study poverty.
• Later, I traveled to Kabul and served in Afghanistan after the fall of the Taliban.
• I traveled to the Gaza Strip. I headed the Middle East Peace Process section in the British Foreign Ministry.
• And far have I traveled To speak the truth now, I prefer my sword to you
• So I traveled to Boston, to Cambridge, and I went to this wonderful Ig Nobel Prize ceremony held at Harvard University, and this ceremony is a very nice experience.
• And over the last decade, I traveled to over 40 countries to see jaguars and bears and elephants and tigers and rhinos.
• I traveled to the Gaza Strip.