Mexico City — President Felipe Calderon is figuratively going out on a limb – and literally down a sinkhole, up a river (with a paddle) and over the top of a few pyramids – in an attempt to boost Mexico's flagging tourism industry.

The balding, 49-year-old leader is personally trying to change his country's violent reputation by appearing as a sort of adventure tour guide in a series of TV programs to be broadcast starting in September on Public Broadcasting Service stations in the United States.

The president dons an Indiana Jones-style hat and a harness and descends a rope into the 1,000-foot-deep (375-meter) Sotano de las Golondrinas cavern, accompanied by Peter Greenberg, host of the "The Royal Tour" TV series. Calderon also straps on scuba tanks to lead Greenberg into a sinkhole lake known as a cenote in Yucatan. And he helps a Lacandon Indian paddle a boat down a river in a jungle in southern Chiapas state.

In the 30-minute videos, Calderon breaks from his image as a lawyerly policy wonk best known for launching a bloody, controversial offensive against drug cartels. He plans to attend a premiere of the show within a few weeks, according to Tourism Department spokesman Roberto Martinez.

"I have other duties that are more dangerous," Calderon jokes, dangling midair in a cavern as a rope lowers him hundreds of feet to the bottom. The site is in the Gulf coast region of Mexico known as the Huasteca, which is covered in jungle and dotted with caverns, waterfalls and crystalline pools.

Calderon swaps the explorer hat for a helmet with a headlamp for the descent into the Golondrinas cave, named for the huge flocks of birds that live inside. Calderon also appears in underwater footage from the stalactite-studded cenote in Yucatan, where he flashes the camera an "OK" signal from behind his dive mask.

Analysts say the videos represent a distinct break from the solemn treatment that has long characterized the Mexican presidency but fit in with Calderon, who has emphasized using the media to get his message across, and who has sought to project a forceful image.