Waterloo

All right... kudos to Katy who actually put forth her answer to my silly clue and got it right! Matt is traveling via the Eurostar (bullet train) to Waterloo, Belgium (near Brussels) to visit a large Caterpillar manufacturing facility.

Where in the World is Matt Dobberfuhl? (Part 2)

After enjoying a generous sojurn at home,

Monsieur Dobberfuhl is headed out once again to roam.

To the battlefield of Europe he embarks on his quest

wearing black, red and yellow displayed on his vest.

He'll have no time to waffle around,

for two languages he'll have to articulately sound

for whilst he is at this capital of the E.U.

there'll be his girls home missing him: boo-hoo!