This paper describes a tool for aligning and searching parallel treebanks. Such treebanks are a new type of parallel corpora that come with syntactic annotation on both languages plus sub-sentential alignment. Our tool allows the visualization of tree pairs and the comfortable annotation of word and phrase alignments. It also allows monolingual and bilingual searches including the specification of alignment constraints. We show that the TIGER-Search query language can easily be combined with such alignment constraints to obtain a powerful cross-lingual query language.